609 lines
17 KiB
LLVM
609 lines
17 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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define i32 @pow2_multiplier(i32 %A) {
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; CHECK-LABEL: @pow2_multiplier(
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; CHECK-NEXT: [[B:%.*]] = shl i32 [[A:%.*]], 1
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; CHECK-NEXT: ret i32 [[B]]
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;
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%B = mul i32 %A, 2
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ret i32 %B
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}
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define <2 x i32> @pow2_multiplier_vec(<2 x i32> %A) {
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; CHECK-LABEL: @pow2_multiplier_vec(
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; CHECK-NEXT: [[B:%.*]] = shl <2 x i32> [[A:%.*]], <i32 3, i32 3>
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; CHECK-NEXT: ret <2 x i32> [[B]]
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;
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%B = mul <2 x i32> %A, <i32 8, i32 8>
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ret <2 x i32> %B
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}
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define i8 @combine_shl(i8 %A) {
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; CHECK-LABEL: @combine_shl(
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; CHECK-NEXT: [[C:%.*]] = shl i8 [[A:%.*]], 6
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; CHECK-NEXT: ret i8 [[C]]
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;
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%B = mul i8 %A, 8
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%C = mul i8 %B, 8
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ret i8 %C
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}
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define i32 @neg(i32 %i) {
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; CHECK-LABEL: @neg(
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; CHECK-NEXT: [[TMP:%.*]] = sub i32 0, [[I:%.*]]
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; CHECK-NEXT: ret i32 [[TMP]]
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;
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%tmp = mul i32 %i, -1
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ret i32 %tmp
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}
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; Use the sign-bit as a mask:
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; (zext (A < 0)) * B --> (A >> 31) & B
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define i32 @test10(i32 %a, i32 %b) {
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; CHECK-LABEL: @test10(
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; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[A:%.*]], 31
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; CHECK-NEXT: [[E:%.*]] = and i32 [[TMP1]], [[B:%.*]]
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; CHECK-NEXT: ret i32 [[E]]
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;
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%c = icmp slt i32 %a, 0
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%d = zext i1 %c to i32
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%e = mul i32 %d, %b
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ret i32 %e
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}
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define i32 @test11(i32 %a, i32 %b) {
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; CHECK-LABEL: @test11(
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; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[A:%.*]], 31
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; CHECK-NEXT: [[E:%.*]] = and i32 [[TMP1]], [[B:%.*]]
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; CHECK-NEXT: ret i32 [[E]]
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;
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%c = icmp sle i32 %a, -1
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%d = zext i1 %c to i32
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%e = mul i32 %d, %b
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ret i32 %e
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}
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declare void @use32(i32)
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define i32 @test12(i32 %a, i32 %b) {
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; CHECK-LABEL: @test12(
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; CHECK-NEXT: [[A_LOBIT:%.*]] = lshr i32 [[A:%.*]], 31
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; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[A]], 31
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; CHECK-NEXT: [[E:%.*]] = and i32 [[TMP1]], [[B:%.*]]
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; CHECK-NEXT: call void @use32(i32 [[A_LOBIT]])
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; CHECK-NEXT: ret i32 [[E]]
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;
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%c = icmp ugt i32 %a, 2147483647
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%d = zext i1 %c to i32
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%e = mul i32 %d, %b
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call void @use32(i32 %d)
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ret i32 %e
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}
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; rdar://7293527
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define i32 @test15(i32 %A, i32 %B) {
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; CHECK-LABEL: @test15(
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; CHECK-NEXT: [[M:%.*]] = shl i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret i32 [[M]]
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;
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%shl = shl i32 1, %B
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%m = mul i32 %shl, %A
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ret i32 %m
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}
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; X * Y (when Y is a boolean) --> Y ? X : 0
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define i32 @mul_bool(i32 %x, i1 %y) {
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; CHECK-LABEL: @mul_bool(
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; CHECK-NEXT: [[M:%.*]] = select i1 [[Y:%.*]], i32 [[X:%.*]], i32 0
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; CHECK-NEXT: ret i32 [[M]]
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;
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%z = zext i1 %y to i32
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%m = mul i32 %x, %z
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ret i32 %m
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}
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; Commute and test vector type.
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define <2 x i32> @mul_bool_vec(<2 x i32> %x, <2 x i1> %y) {
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; CHECK-LABEL: @mul_bool_vec(
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; CHECK-NEXT: [[M:%.*]] = select <2 x i1> [[Y:%.*]], <2 x i32> [[X:%.*]], <2 x i32> zeroinitializer
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; CHECK-NEXT: ret <2 x i32> [[M]]
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;
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%z = zext <2 x i1> %y to <2 x i32>
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%m = mul <2 x i32> %x, %z
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ret <2 x i32> %m
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}
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define <2 x i32> @mul_bool_vec_commute(<2 x i32> %x, <2 x i1> %y) {
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; CHECK-LABEL: @mul_bool_vec_commute(
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; CHECK-NEXT: [[M:%.*]] = select <2 x i1> [[Y:%.*]], <2 x i32> [[X:%.*]], <2 x i32> zeroinitializer
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; CHECK-NEXT: ret <2 x i32> [[M]]
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;
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%z = zext <2 x i1> %y to <2 x i32>
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%m = mul <2 x i32> %z, %x
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ret <2 x i32> %m
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}
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; (A >>u 31) * B --> (A >>s 31) & B
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define i32 @signbit_mul(i32 %a, i32 %b) {
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; CHECK-LABEL: @signbit_mul(
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; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[A:%.*]], 31
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; CHECK-NEXT: [[E:%.*]] = and i32 [[TMP1]], [[B:%.*]]
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; CHECK-NEXT: ret i32 [[E]]
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;
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%d = lshr i32 %a, 31
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%e = mul i32 %d, %b
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ret i32 %e
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}
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define i32 @signbit_mul_commute_extra_use(i32 %a, i32 %b) {
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; CHECK-LABEL: @signbit_mul_commute_extra_use(
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; CHECK-NEXT: [[D:%.*]] = lshr i32 [[A:%.*]], 31
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; CHECK-NEXT: [[TMP1:%.*]] = ashr i32 [[A]], 31
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; CHECK-NEXT: [[E:%.*]] = and i32 [[TMP1]], [[B:%.*]]
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; CHECK-NEXT: call void @use32(i32 [[D]])
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; CHECK-NEXT: ret i32 [[E]]
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;
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%d = lshr i32 %a, 31
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%e = mul i32 %b, %d
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call void @use32(i32 %d)
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ret i32 %e
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}
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; (A >>u 31)) * B --> (A >>s 31) & B
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define <2 x i32> @signbit_mul_vec(<2 x i32> %a, <2 x i32> %b) {
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; CHECK-LABEL: @signbit_mul_vec(
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; CHECK-NEXT: [[TMP1:%.*]] = ashr <2 x i32> [[A:%.*]], <i32 31, i32 31>
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; CHECK-NEXT: [[E:%.*]] = and <2 x i32> [[TMP1]], [[B:%.*]]
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; CHECK-NEXT: ret <2 x i32> [[E]]
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;
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%d = lshr <2 x i32> %a, <i32 31, i32 31>
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%e = mul <2 x i32> %d, %b
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ret <2 x i32> %e
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}
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define <2 x i32> @signbit_mul_vec_commute(<2 x i32> %a, <2 x i32> %b) {
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; CHECK-LABEL: @signbit_mul_vec_commute(
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; CHECK-NEXT: [[TMP1:%.*]] = ashr <2 x i32> [[A:%.*]], <i32 31, i32 31>
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; CHECK-NEXT: [[E:%.*]] = and <2 x i32> [[TMP1]], [[B:%.*]]
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; CHECK-NEXT: ret <2 x i32> [[E]]
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;
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%d = lshr <2 x i32> %a, <i32 31, i32 31>
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%e = mul <2 x i32> %b, %d
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ret <2 x i32> %e
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}
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define i32 @test18(i32 %A, i32 %B) {
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; CHECK-LABEL: @test18(
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; CHECK-NEXT: ret i32 0
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;
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%C = and i32 %A, 1
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%D = and i32 %B, 1
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%E = mul i32 %C, %D
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%F = and i32 %E, 16
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ret i32 %F
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}
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declare {i32, i1} @llvm.smul.with.overflow.i32(i32, i32)
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declare void @use(i1)
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define i32 @test19(i32 %A, i32 %B) {
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; CHECK-LABEL: @test19(
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; CHECK-NEXT: call void @use(i1 false)
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; CHECK-NEXT: ret i32 0
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;
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%C = and i32 %A, 1
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%D = and i32 %B, 1
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; It would be nice if we also started proving that this doesn't overflow.
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%E = call {i32, i1} @llvm.smul.with.overflow.i32(i32 %C, i32 %D)
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%F = extractvalue {i32, i1} %E, 0
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%G = extractvalue {i32, i1} %E, 1
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call void @use(i1 %G)
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%H = and i32 %F, 16
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ret i32 %H
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}
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define <2 x i64> @test20(<2 x i64> %A) {
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; CHECK-LABEL: @test20(
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; CHECK-NEXT: [[TMP1:%.*]] = mul <2 x i64> [[A:%.*]], <i64 3, i64 2>
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; CHECK-NEXT: [[C:%.*]] = add <2 x i64> [[TMP1]], <i64 36, i64 28>
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; CHECK-NEXT: ret <2 x i64> [[C]]
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;
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%B = add <2 x i64> %A, <i64 12, i64 14>
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%C = mul <2 x i64> %B, <i64 3, i64 2>
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ret <2 x i64> %C
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}
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define <2 x i1> @test21(<2 x i1> %A, <2 x i1> %B) {
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; CHECK-LABEL: @test21(
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; CHECK-NEXT: [[C:%.*]] = and <2 x i1> [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret <2 x i1> [[C]]
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;
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%C = mul <2 x i1> %A, %B
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ret <2 x i1> %C
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}
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define i32 @test22(i32 %A) {
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; CHECK-LABEL: @test22(
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; CHECK-NEXT: [[B:%.*]] = sub nsw i32 0, [[A:%.*]]
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; CHECK-NEXT: ret i32 [[B]]
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;
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%B = mul nsw i32 %A, -1
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ret i32 %B
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}
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define i32 @test23(i32 %A) {
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; CHECK-LABEL: @test23(
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; CHECK-NEXT: [[C:%.*]] = mul nuw i32 [[A:%.*]], 6
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; CHECK-NEXT: ret i32 [[C]]
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;
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%B = shl nuw i32 %A, 1
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%C = mul nuw i32 %B, 3
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ret i32 %C
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}
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define i32 @test24(i32 %A) {
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; CHECK-LABEL: @test24(
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; CHECK-NEXT: [[C:%.*]] = mul nsw i32 [[A:%.*]], 6
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; CHECK-NEXT: ret i32 [[C]]
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;
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%B = shl nsw i32 %A, 1
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%C = mul nsw i32 %B, 3
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ret i32 %C
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}
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define i32 @neg_neg_mul(i32 %A, i32 %B) {
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; CHECK-LABEL: @neg_neg_mul(
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; CHECK-NEXT: [[E:%.*]] = mul i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret i32 [[E]]
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;
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%C = sub i32 0, %A
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%D = sub i32 0, %B
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%E = mul i32 %C, %D
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ret i32 %E
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}
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define i32 @neg_neg_mul_nsw(i32 %A, i32 %B) {
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; CHECK-LABEL: @neg_neg_mul_nsw(
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; CHECK-NEXT: [[E:%.*]] = mul nsw i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret i32 [[E]]
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;
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%C = sub nsw i32 0, %A
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%D = sub nsw i32 0, %B
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%E = mul nsw i32 %C, %D
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ret i32 %E
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}
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define i124 @neg_neg_mul_apint(i124 %A, i124 %B) {
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; CHECK-LABEL: @neg_neg_mul_apint(
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; CHECK-NEXT: [[E:%.*]] = mul i124 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret i124 [[E]]
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;
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%C = sub i124 0, %A
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%D = sub i124 0, %B
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%E = mul i124 %C, %D
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ret i124 %E
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}
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define i32 @neg_mul_constant(i32 %A) {
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; CHECK-LABEL: @neg_mul_constant(
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; CHECK-NEXT: [[E:%.*]] = mul i32 [[A:%.*]], -7
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; CHECK-NEXT: ret i32 [[E]]
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;
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%C = sub i32 0, %A
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%E = mul i32 %C, 7
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ret i32 %E
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}
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define i55 @neg_mul_constant_apint(i55 %A) {
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; CHECK-LABEL: @neg_mul_constant_apint(
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; CHECK-NEXT: [[E:%.*]] = mul i55 [[A:%.*]], -7
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; CHECK-NEXT: ret i55 [[E]]
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;
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%C = sub i55 0, %A
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%E = mul i55 %C, 7
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ret i55 %E
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}
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define <3 x i8> @neg_mul_constant_vec(<3 x i8> %a) {
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; CHECK-LABEL: @neg_mul_constant_vec(
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; CHECK-NEXT: [[B:%.*]] = mul <3 x i8> [[A:%.*]], <i8 -5, i8 -5, i8 -5>
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; CHECK-NEXT: ret <3 x i8> [[B]]
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;
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%A = sub <3 x i8> zeroinitializer, %a
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%B = mul <3 x i8> %A, <i8 5, i8 5, i8 5>
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ret <3 x i8> %B
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}
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define <3 x i4> @neg_mul_constant_vec_weird(<3 x i4> %a) {
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; CHECK-LABEL: @neg_mul_constant_vec_weird(
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; CHECK-NEXT: [[B:%.*]] = mul <3 x i4> [[A:%.*]], <i4 -5, i4 -5, i4 -5>
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; CHECK-NEXT: ret <3 x i4> [[B]]
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;
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%A = sub <3 x i4> zeroinitializer, %a
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%B = mul <3 x i4> %A, <i4 5, i4 5, i4 5>
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ret <3 x i4> %B
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}
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define i32 @test26(i32 %A, i32 %B) {
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; CHECK-LABEL: @test26(
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; CHECK-NEXT: [[D:%.*]] = shl nsw i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret i32 [[D]]
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;
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%C = shl nsw i32 1, %B
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%D = mul nsw i32 %A, %C
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ret i32 %D
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}
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define i32 @test27(i32 %A, i32 %B) {
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; CHECK-LABEL: @test27(
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; CHECK-NEXT: [[D:%.*]] = shl nuw i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret i32 [[D]]
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;
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%C = shl i32 1, %B
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%D = mul nuw i32 %A, %C
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ret i32 %D
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}
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define i32 @test28(i32 %A) {
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; CHECK-LABEL: @test28(
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; CHECK-NEXT: [[B:%.*]] = shl i32 1, [[A:%.*]]
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; CHECK-NEXT: [[C:%.*]] = shl i32 [[B]], [[A]]
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; CHECK-NEXT: ret i32 [[C]]
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;
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%B = shl i32 1, %A
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%C = mul nsw i32 %B, %B
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ret i32 %C
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}
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define i64 @test29(i31 %A, i31 %B) {
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; CHECK-LABEL: @test29(
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; CHECK-NEXT: [[C:%.*]] = sext i31 [[A:%.*]] to i64
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; CHECK-NEXT: [[D:%.*]] = sext i31 [[B:%.*]] to i64
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; CHECK-NEXT: [[E:%.*]] = mul nsw i64 [[C]], [[D]]
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; CHECK-NEXT: ret i64 [[E]]
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;
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%C = sext i31 %A to i64
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%D = sext i31 %B to i64
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%E = mul i64 %C, %D
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ret i64 %E
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}
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define i64 @test30(i32 %A, i32 %B) {
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; CHECK-LABEL: @test30(
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; CHECK-NEXT: [[C:%.*]] = zext i32 [[A:%.*]] to i64
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; CHECK-NEXT: [[D:%.*]] = zext i32 [[B:%.*]] to i64
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; CHECK-NEXT: [[E:%.*]] = mul nuw i64 [[C]], [[D]]
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; CHECK-NEXT: ret i64 [[E]]
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;
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%C = zext i32 %A to i64
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%D = zext i32 %B to i64
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%E = mul i64 %C, %D
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ret i64 %E
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}
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@PR22087 = external global i32
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define i32 @test31(i32 %V) {
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; CHECK-LABEL: @test31(
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; CHECK-NEXT: [[MUL:%.*]] = shl i32 [[V:%.*]], zext (i1 icmp ne (i32* inttoptr (i64 1 to i32*), i32* @PR22087) to i32)
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; CHECK-NEXT: ret i32 [[MUL]]
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;
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%mul = mul i32 %V, shl (i32 1, i32 zext (i1 icmp ne (i32* inttoptr (i64 1 to i32*), i32* @PR22087) to i32))
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ret i32 %mul
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}
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define i32 @test32(i32 %X) {
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; CHECK-LABEL: @test32(
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; CHECK-NEXT: [[MUL:%.*]] = shl i32 [[X:%.*]], 31
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; CHECK-NEXT: ret i32 [[MUL]]
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;
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%mul = mul nsw i32 %X, -2147483648
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ret i32 %mul
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}
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define <2 x i32> @test32vec(<2 x i32> %X) {
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; CHECK-LABEL: @test32vec(
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; CHECK-NEXT: [[MUL:%.*]] = shl <2 x i32> [[X:%.*]], <i32 31, i32 31>
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; CHECK-NEXT: ret <2 x i32> [[MUL]]
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;
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%mul = mul nsw <2 x i32> %X, <i32 -2147483648, i32 -2147483648>
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ret <2 x i32> %mul
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}
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define i32 @test33(i32 %X) {
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; CHECK-LABEL: @test33(
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; CHECK-NEXT: [[MUL:%.*]] = shl nsw i32 [[X:%.*]], 30
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; CHECK-NEXT: ret i32 [[MUL]]
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;
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%mul = mul nsw i32 %X, 1073741824
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ret i32 %mul
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}
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define <2 x i32> @test33vec(<2 x i32> %X) {
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; CHECK-LABEL: @test33vec(
|
|
; CHECK-NEXT: [[MUL:%.*]] = shl nsw <2 x i32> [[X:%.*]], <i32 30, i32 30>
|
|
; CHECK-NEXT: ret <2 x i32> [[MUL]]
|
|
;
|
|
%mul = mul nsw <2 x i32> %X, <i32 1073741824, i32 1073741824>
|
|
ret <2 x i32> %mul
|
|
}
|
|
|
|
define i128 @test34(i128 %X) {
|
|
; CHECK-LABEL: @test34(
|
|
; CHECK-NEXT: [[MUL:%.*]] = shl nsw i128 [[X:%.*]], 1
|
|
; CHECK-NEXT: ret i128 [[MUL]]
|
|
;
|
|
%mul = mul nsw i128 %X, 2
|
|
ret i128 %mul
|
|
}
|
|
|
|
define i32 @test_mul_canonicalize_op0(i32 %x, i32 %y) {
|
|
; CHECK-LABEL: @test_mul_canonicalize_op0(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = mul i32 [[X:%.*]], [[Y:%.*]]
|
|
; CHECK-NEXT: [[MUL:%.*]] = sub i32 0, [[TMP1]]
|
|
; CHECK-NEXT: ret i32 [[MUL]]
|
|
;
|
|
%neg = sub i32 0, %x
|
|
%mul = mul i32 %neg, %y
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @test_mul_canonicalize_op1(i32 %x, i32 %z) {
|
|
; CHECK-LABEL: @test_mul_canonicalize_op1(
|
|
; CHECK-NEXT: [[Y_NEG:%.*]] = mul i32 [[Z:%.*]], -3
|
|
; CHECK-NEXT: [[DOTNEG:%.*]] = mul i32 [[Y_NEG]], [[X:%.*]]
|
|
; CHECK-NEXT: ret i32 [[DOTNEG]]
|
|
;
|
|
%y = mul i32 %z, 3
|
|
%neg = sub i32 0, %x
|
|
%mul = mul i32 %y, %neg
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @test_mul_canonicalize_nsw(i32 %x, i32 %y) {
|
|
; CHECK-LABEL: @test_mul_canonicalize_nsw(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = mul i32 [[X:%.*]], [[Y:%.*]]
|
|
; CHECK-NEXT: [[MUL:%.*]] = sub i32 0, [[TMP1]]
|
|
; CHECK-NEXT: ret i32 [[MUL]]
|
|
;
|
|
%neg = sub nsw i32 0, %x
|
|
%mul = mul nsw i32 %neg, %y
|
|
ret i32 %mul
|
|
}
|
|
|
|
define <2 x i32> @test_mul_canonicalize_vec(<2 x i32> %x, <2 x i32> %y) {
|
|
; CHECK-LABEL: @test_mul_canonicalize_vec(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = mul <2 x i32> [[X:%.*]], [[Y:%.*]]
|
|
; CHECK-NEXT: [[MUL:%.*]] = sub <2 x i32> zeroinitializer, [[TMP1]]
|
|
; CHECK-NEXT: ret <2 x i32> [[MUL]]
|
|
;
|
|
%neg = sub <2 x i32> <i32 0, i32 0>, %x
|
|
%mul = mul <2 x i32> %neg, %y
|
|
ret <2 x i32> %mul
|
|
}
|
|
|
|
define i32 @test_mul_canonicalize_multiple_uses(i32 %x, i32 %y) {
|
|
; CHECK-LABEL: @test_mul_canonicalize_multiple_uses(
|
|
; CHECK-NEXT: [[NEG:%.*]] = sub i32 0, [[X:%.*]]
|
|
; CHECK-NEXT: [[MUL:%.*]] = mul i32 [[NEG]], [[Y:%.*]]
|
|
; CHECK-NEXT: [[MUL2:%.*]] = mul i32 [[MUL]], [[NEG]]
|
|
; CHECK-NEXT: ret i32 [[MUL2]]
|
|
;
|
|
%neg = sub i32 0, %x
|
|
%mul = mul i32 %neg, %y
|
|
%mul2 = mul i32 %mul, %neg
|
|
ret i32 %mul2
|
|
}
|
|
|
|
@X = global i32 5
|
|
|
|
define i64 @test_mul_canonicalize_neg_is_not_undone(i64 %L1) {
|
|
; Check we do not undo the canonicalization of 0 - (X * Y), if Y is a constant
|
|
; expr.
|
|
; CHECK-LABEL: @test_mul_canonicalize_neg_is_not_undone(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = mul i64 [[L1:%.*]], ptrtoint (i32* @X to i64)
|
|
; CHECK-NEXT: [[B4:%.*]] = sub i64 0, [[TMP1]]
|
|
; CHECK-NEXT: ret i64 [[B4]]
|
|
;
|
|
%v1 = ptrtoint i32* @X to i64
|
|
%B8 = sub i64 0, %v1
|
|
%B4 = mul i64 %B8, %L1
|
|
ret i64 %B4
|
|
}
|
|
|
|
define i32 @negate_if_true(i32 %x, i1 %cond) {
|
|
; CHECK-LABEL: @negate_if_true(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i32 0, [[X:%.*]]
|
|
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[COND:%.*]], i32 [[TMP1]], i32 [[X]]
|
|
; CHECK-NEXT: ret i32 [[TMP2]]
|
|
;
|
|
%sel = select i1 %cond, i32 -1, i32 1
|
|
%r = mul i32 %sel, %x
|
|
ret i32 %r
|
|
}
|
|
|
|
define i32 @negate_if_false(i32 %x, i1 %cond) {
|
|
; CHECK-LABEL: @negate_if_false(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i32 0, [[X:%.*]]
|
|
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[COND:%.*]], i32 [[X]], i32 [[TMP1]]
|
|
; CHECK-NEXT: ret i32 [[TMP2]]
|
|
;
|
|
%sel = select i1 %cond, i32 1, i32 -1
|
|
%r = mul i32 %sel, %x
|
|
ret i32 %r
|
|
}
|
|
|
|
define <2 x i8> @negate_if_true_commute(<2 x i8> %px, i1 %cond) {
|
|
; CHECK-LABEL: @negate_if_true_commute(
|
|
; CHECK-NEXT: [[X:%.*]] = sdiv <2 x i8> <i8 42, i8 42>, [[PX:%.*]]
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub nsw <2 x i8> zeroinitializer, [[X]]
|
|
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[COND:%.*]], <2 x i8> [[TMP1]], <2 x i8> [[X]]
|
|
; CHECK-NEXT: ret <2 x i8> [[TMP2]]
|
|
;
|
|
%x = sdiv <2 x i8> <i8 42, i8 42>, %px ; thwart complexity-based canonicalization
|
|
%sel = select i1 %cond, <2 x i8> <i8 -1, i8 -1>, <2 x i8> <i8 1, i8 1>
|
|
%r = mul <2 x i8> %x, %sel
|
|
ret <2 x i8> %r
|
|
}
|
|
|
|
define <2 x i8> @negate_if_false_commute(<2 x i8> %px, <2 x i1> %cond) {
|
|
; CHECK-LABEL: @negate_if_false_commute(
|
|
; CHECK-NEXT: [[X:%.*]] = sdiv <2 x i8> <i8 42, i8 5>, [[PX:%.*]]
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub <2 x i8> zeroinitializer, [[X]]
|
|
; CHECK-NEXT: [[TMP2:%.*]] = select <2 x i1> [[COND:%.*]], <2 x i8> [[X]], <2 x i8> [[TMP1]]
|
|
; CHECK-NEXT: ret <2 x i8> [[TMP2]]
|
|
;
|
|
%x = sdiv <2 x i8> <i8 42, i8 5>, %px ; thwart complexity-based canonicalization
|
|
%sel = select <2 x i1> %cond, <2 x i8> <i8 1, i8 undef>, <2 x i8> <i8 -1, i8 -1>
|
|
%r = mul <2 x i8> %x, %sel
|
|
ret <2 x i8> %r
|
|
}
|
|
|
|
; Negative test
|
|
|
|
define i32 @negate_if_true_extra_use(i32 %x, i1 %cond) {
|
|
; CHECK-LABEL: @negate_if_true_extra_use(
|
|
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[COND:%.*]], i32 -1, i32 1
|
|
; CHECK-NEXT: call void @use32(i32 [[SEL]])
|
|
; CHECK-NEXT: [[R:%.*]] = mul i32 [[SEL]], [[X:%.*]]
|
|
; CHECK-NEXT: ret i32 [[R]]
|
|
;
|
|
%sel = select i1 %cond, i32 -1, i32 1
|
|
call void @use32(i32 %sel)
|
|
%r = mul i32 %sel, %x
|
|
ret i32 %r
|
|
}
|
|
|
|
; Negative test
|
|
|
|
define <2 x i8> @negate_if_true_wrong_constant(<2 x i8> %px, i1 %cond) {
|
|
; CHECK-LABEL: @negate_if_true_wrong_constant(
|
|
; CHECK-NEXT: [[X:%.*]] = sdiv <2 x i8> <i8 42, i8 42>, [[PX:%.*]]
|
|
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[COND:%.*]], <2 x i8> <i8 -1, i8 0>, <2 x i8> <i8 1, i8 1>
|
|
; CHECK-NEXT: [[R:%.*]] = mul <2 x i8> [[X]], [[SEL]]
|
|
; CHECK-NEXT: ret <2 x i8> [[R]]
|
|
;
|
|
%x = sdiv <2 x i8> <i8 42, i8 42>, %px ; thwart complexity-based canonicalization
|
|
%sel = select i1 %cond, <2 x i8> <i8 -1, i8 0>, <2 x i8> <i8 1, i8 1>
|
|
%r = mul <2 x i8> %x, %sel
|
|
ret <2 x i8> %r
|
|
}
|
|
|
|
; (C ? (X /exact Y) : 1) * Y -> C ? X : Y
|
|
define i32 @mul_div_select(i32 %x, i32 %y, i1 %c) {
|
|
; CHECK-LABEL: @mul_div_select(
|
|
; CHECK-NEXT: [[MUL:%.*]] = select i1 [[C:%.*]], i32 [[X:%.*]], i32 [[Y:%.*]]
|
|
; CHECK-NEXT: ret i32 [[MUL]]
|
|
;
|
|
%div = udiv exact i32 %x, %y
|
|
%sel = select i1 %c, i32 %div, i32 1
|
|
%mul = mul i32 %sel, %y
|
|
ret i32 %mul
|
|
}
|