434 lines
12 KiB
LLVM
434 lines
12 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instsimplify -S | FileCheck %s
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define i32 @test1(i32 %x) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: ret i32 %x
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;
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%and = and i32 %x, 1
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%cmp = icmp eq i32 %and, 0
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%and1 = and i32 %x, -2
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%and1.x = select i1 %cmp, i32 %and1, i32 %x
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ret i32 %and1.x
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}
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define i32 @test2(i32 %x) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: ret i32 %x
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;
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%and = and i32 %x, 1
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%cmp = icmp ne i32 %and, 0
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%and1 = and i32 %x, -2
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%and1.x = select i1 %cmp, i32 %x, i32 %and1
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ret i32 %and1.x
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}
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define i32 @test3(i32 %x) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[AND1:%.*]] = and i32 %x, -2
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; CHECK-NEXT: ret i32 [[AND1]]
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;
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%and = and i32 %x, 1
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%cmp = icmp ne i32 %and, 0
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%and1 = and i32 %x, -2
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%and1.x = select i1 %cmp, i32 %and1, i32 %x
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ret i32 %and1.x
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}
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define i32 @test4(i32 %X) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: [[OR:%.*]] = or i32 %X, -2147483648
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; CHECK-NEXT: ret i32 [[OR]]
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;
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%cmp = icmp slt i32 %X, 0
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%or = or i32 %X, -2147483648
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%cond = select i1 %cmp, i32 %X, i32 %or
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ret i32 %cond
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}
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define i32 @test5(i32 %X) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: ret i32 %X
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;
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%cmp = icmp slt i32 %X, 0
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%or = or i32 %X, -2147483648
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%cond = select i1 %cmp, i32 %or, i32 %X
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ret i32 %cond
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}
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define i32 @test6(i32 %X) {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: [[AND:%.*]] = and i32 %X, 2147483647
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; CHECK-NEXT: ret i32 [[AND]]
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;
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%cmp = icmp slt i32 %X, 0
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%and = and i32 %X, 2147483647
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%cond = select i1 %cmp, i32 %and, i32 %X
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ret i32 %cond
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}
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define i32 @test7(i32 %X) {
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; CHECK-LABEL: @test7(
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; CHECK-NEXT: ret i32 %X
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;
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%cmp = icmp slt i32 %X, 0
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%and = and i32 %X, 2147483647
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%cond = select i1 %cmp, i32 %X, i32 %and
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ret i32 %cond
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}
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define i32 @test8(i32 %X) {
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; CHECK-LABEL: @test8(
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; CHECK-NEXT: ret i32 %X
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;
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%cmp = icmp sgt i32 %X, -1
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%or = or i32 %X, -2147483648
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%cond = select i1 %cmp, i32 %X, i32 %or
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ret i32 %cond
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}
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define i32 @test9(i32 %X) {
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; CHECK-LABEL: @test9(
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; CHECK-NEXT: [[OR:%.*]] = or i32 %X, -2147483648
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; CHECK-NEXT: ret i32 [[OR]]
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;
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%cmp = icmp sgt i32 %X, -1
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%or = or i32 %X, -2147483648
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%cond = select i1 %cmp, i32 %or, i32 %X
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ret i32 %cond
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}
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define i32 @test10(i32 %X) {
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; CHECK-LABEL: @test10(
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; CHECK-NEXT: ret i32 %X
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;
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%cmp = icmp sgt i32 %X, -1
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%and = and i32 %X, 2147483647
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%cond = select i1 %cmp, i32 %and, i32 %X
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ret i32 %cond
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}
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define i32 @test11(i32 %X) {
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; CHECK-LABEL: @test11(
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; CHECK-NEXT: [[AND:%.*]] = and i32 %X, 2147483647
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; CHECK-NEXT: ret i32 [[AND]]
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;
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%cmp = icmp sgt i32 %X, -1
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%and = and i32 %X, 2147483647
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%cond = select i1 %cmp, i32 %X, i32 %and
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ret i32 %cond
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}
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define <2 x i8> @test11vec(<2 x i8> %X) {
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; CHECK-LABEL: @test11vec(
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; CHECK-NEXT: [[AND:%.*]] = and <2 x i8> %X, <i8 127, i8 127>
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; CHECK-NEXT: ret <2 x i8> [[AND]]
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;
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%cmp = icmp sgt <2 x i8> %X, <i8 -1, i8 -1>
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%and = and <2 x i8> %X, <i8 127, i8 127>
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%sel = select <2 x i1> %cmp, <2 x i8> %X, <2 x i8> %and
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ret <2 x i8> %sel
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}
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define i32 @select_icmp_and_8_eq_0_or_8(i32 %x) {
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; CHECK-LABEL: @select_icmp_and_8_eq_0_or_8(
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; CHECK-NEXT: [[OR:%.*]] = or i32 %x, 8
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; CHECK-NEXT: ret i32 [[OR]]
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;
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%and = and i32 %x, 8
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%cmp = icmp eq i32 %and, 0
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%or = or i32 %x, 8
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%sel = select i1 %cmp, i32 %or, i32 %x
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ret i32 %sel
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}
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define i32 @select_icmp_and_8_eq_0_or_8_alt(i32 %x) {
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; CHECK-LABEL: @select_icmp_and_8_eq_0_or_8_alt(
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; CHECK-NEXT: [[OR:%.*]] = or i32 %x, 8
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; CHECK-NEXT: ret i32 [[OR]]
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;
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%and = and i32 %x, 8
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%cmp = icmp ne i32 %and, 0
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%or = or i32 %x, 8
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%sel = select i1 %cmp, i32 %x, i32 %or
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ret i32 %sel
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}
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define i32 @select_icmp_and_8_ne_0_or_8(i32 %x) {
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; CHECK-LABEL: @select_icmp_and_8_ne_0_or_8(
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; CHECK-NEXT: ret i32 %x
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;
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%and = and i32 %x, 8
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%cmp = icmp ne i32 %and, 0
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%or = or i32 %x, 8
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%sel = select i1 %cmp, i32 %or, i32 %x
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ret i32 %sel
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}
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define i32 @select_icmp_and_8_ne_0_or_8_alt(i32 %x) {
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; CHECK-LABEL: @select_icmp_and_8_ne_0_or_8_alt(
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; CHECK-NEXT: ret i32 %x
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;
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%and = and i32 %x, 8
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%cmp = icmp eq i32 %and, 0
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%or = or i32 %x, 8
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%sel = select i1 %cmp, i32 %x, i32 %or
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ret i32 %sel
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}
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define i32 @select_icmp_and_8_eq_0_and_not_8(i32 %x) {
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; CHECK-LABEL: @select_icmp_and_8_eq_0_and_not_8(
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; CHECK-NEXT: [[AND1:%.*]] = and i32 %x, -9
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; CHECK-NEXT: ret i32 [[AND1]]
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;
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%and = and i32 %x, 8
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%cmp = icmp eq i32 %and, 0
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%and1 = and i32 %x, -9
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%sel = select i1 %cmp, i32 %x, i32 %and1
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ret i32 %sel
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}
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define i32 @select_icmp_and_8_eq_0_and_not_8_alt(i32 %x) {
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; CHECK-LABEL: @select_icmp_and_8_eq_0_and_not_8_alt(
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; CHECK-NEXT: [[AND1:%.*]] = and i32 %x, -9
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; CHECK-NEXT: ret i32 [[AND1]]
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;
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%and = and i32 %x, 8
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%cmp = icmp ne i32 %and, 0
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%and1 = and i32 %x, -9
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%sel = select i1 %cmp, i32 %and1, i32 %x
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ret i32 %sel
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}
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define i32 @select_icmp_and_8_ne_0_and_not_8(i32 %x) {
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; CHECK-LABEL: @select_icmp_and_8_ne_0_and_not_8(
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; CHECK-NEXT: ret i32 %x
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;
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%and = and i32 %x, 8
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%cmp = icmp ne i32 %and, 0
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%and1 = and i32 %x, -9
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%sel = select i1 %cmp, i32 %x, i32 %and1
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ret i32 %sel
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}
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define i32 @select_icmp_and_8_ne_0_and_not_8_alt(i32 %x) {
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; CHECK-LABEL: @select_icmp_and_8_ne_0_and_not_8_alt(
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; CHECK-NEXT: ret i32 %x
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;
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%and = and i32 %x, 8
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%cmp = icmp eq i32 %and, 0
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%and1 = and i32 %x, -9
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%sel = select i1 %cmp, i32 %and1, i32 %x
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ret i32 %sel
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}
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; PR28466: https://llvm.org/bugs/show_bug.cgi?id=28466
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; Each of the previous 8 patterns has a variant that replaces the
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; 'and' with a 'trunc' and the icmp eq/ne with icmp slt/sgt.
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define i32 @select_icmp_trunc_8_ne_0_or_128(i32 %x) {
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; CHECK-LABEL: @select_icmp_trunc_8_ne_0_or_128(
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; CHECK-NEXT: [[OR:%.*]] = or i32 %x, 128
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; CHECK-NEXT: ret i32 [[OR]]
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;
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%trunc = trunc i32 %x to i8
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%cmp = icmp sgt i8 %trunc, -1
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%or = or i32 %x, 128
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%sel = select i1 %cmp, i32 %or, i32 %x
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ret i32 %sel
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}
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define i32 @select_icmp_trunc_8_ne_0_or_128_alt(i32 %x) {
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; CHECK-LABEL: @select_icmp_trunc_8_ne_0_or_128_alt(
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; CHECK-NEXT: [[OR:%.*]] = or i32 %x, 128
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; CHECK-NEXT: ret i32 [[OR]]
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;
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%trunc = trunc i32 %x to i8
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%cmp = icmp slt i8 %trunc, 0
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%or = or i32 %x, 128
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%sel = select i1 %cmp, i32 %x, i32 %or
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ret i32 %sel
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}
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define i32 @select_icmp_trunc_8_eq_0_or_128(i32 %x) {
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; CHECK-LABEL: @select_icmp_trunc_8_eq_0_or_128(
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; CHECK-NEXT: ret i32 %x
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;
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%trunc = trunc i32 %x to i8
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%cmp = icmp slt i8 %trunc, 0
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%or = or i32 %x, 128
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%sel = select i1 %cmp, i32 %or, i32 %x
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ret i32 %sel
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}
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define i32 @select_icmp_trunc_8_eq_0_or_128_alt(i32 %x) {
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; CHECK-LABEL: @select_icmp_trunc_8_eq_0_or_128_alt(
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; CHECK-NEXT: ret i32 %x
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;
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%trunc = trunc i32 %x to i8
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%cmp = icmp sgt i8 %trunc, -1
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%or = or i32 %x, 128
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%sel = select i1 %cmp, i32 %x, i32 %or
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ret i32 %sel
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}
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define i32 @select_icmp_trunc_8_eq_0_and_not_8(i32 %x) {
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; CHECK-LABEL: @select_icmp_trunc_8_eq_0_and_not_8(
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; CHECK-NEXT: [[AND:%.*]] = and i32 %x, -9
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; CHECK-NEXT: ret i32 [[AND]]
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;
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%trunc = trunc i32 %x to i4
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%cmp = icmp sgt i4 %trunc, -1
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%and = and i32 %x, -9
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%sel = select i1 %cmp, i32 %x, i32 %and
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ret i32 %sel
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}
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define i32 @select_icmp_trunc_8_eq_0_and_not_8_alt(i32 %x) {
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; CHECK-LABEL: @select_icmp_trunc_8_eq_0_and_not_8_alt(
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; CHECK-NEXT: [[AND:%.*]] = and i32 %x, -9
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; CHECK-NEXT: ret i32 [[AND]]
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;
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%trunc = trunc i32 %x to i4
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%cmp = icmp slt i4 %trunc, 0
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%and = and i32 %x, -9
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%sel = select i1 %cmp, i32 %and, i32 %x
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ret i32 %sel
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}
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define i32 @select_icmp_trunc_8_ne_0_and_not_8(i32 %x) {
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; CHECK-LABEL: @select_icmp_trunc_8_ne_0_and_not_8(
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; CHECK-NEXT: ret i32 %x
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;
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%trunc = trunc i32 %x to i4
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%cmp = icmp slt i4 %trunc, 0
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%and = and i32 %x, -9
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%sel = select i1 %cmp, i32 %x, i32 %and
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ret i32 %sel
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}
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define i32 @select_icmp_trunc_8_ne_0_and_not_8_alt(i32 %x) {
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; CHECK-LABEL: @select_icmp_trunc_8_ne_0_and_not_8_alt(
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; CHECK-NEXT: ret i32 %x
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;
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%trunc = trunc i32 %x to i4
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%cmp = icmp sgt i4 %trunc, -1
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%and = and i32 %x, -9
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%sel = select i1 %cmp, i32 %and, i32 %x
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ret i32 %sel
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}
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; Make sure that at least a few of the same patterns are repeated with vector types.
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define <2 x i32> @select_icmp_and_8_ne_0_and_not_8_vec(<2 x i32> %x) {
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; CHECK-LABEL: @select_icmp_and_8_ne_0_and_not_8_vec(
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; CHECK-NEXT: ret <2 x i32> %x
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;
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%and = and <2 x i32> %x, <i32 8, i32 8>
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%cmp = icmp ne <2 x i32> %and, zeroinitializer
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%and1 = and <2 x i32> %x, <i32 -9, i32 -9>
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%sel = select <2 x i1> %cmp, <2 x i32> %x, <2 x i32> %and1
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ret <2 x i32> %sel
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}
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define <2 x i32> @select_icmp_trunc_8_ne_0_and_not_8_alt_vec(<2 x i32> %x) {
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; CHECK-LABEL: @select_icmp_trunc_8_ne_0_and_not_8_alt_vec(
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; CHECK-NEXT: ret <2 x i32> %x
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;
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%trunc = trunc <2 x i32> %x to <2 x i4>
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%cmp = icmp sgt <2 x i4> %trunc, <i4 -1, i4 -1>
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%and = and <2 x i32> %x, <i32 -9, i32 -9>
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%sel = select <2 x i1> %cmp, <2 x i32> %and, <2 x i32> %x
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ret <2 x i32> %sel
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}
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; Insert a bit from x into y? This should be possible in InstCombine, but not InstSimplify?
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define i32 @select_icmp_x_and_8_eq_0_y_and_not_8(i32 %x, i32 %y) {
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; CHECK-LABEL: @select_icmp_x_and_8_eq_0_y_and_not_8(
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; CHECK-NEXT: [[AND:%.*]] = and i32 %x, 8
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[AND]], 0
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; CHECK-NEXT: [[AND1:%.*]] = and i32 %y, -9
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; CHECK-NEXT: [[Y_AND1:%.*]] = select i1 [[CMP]], i32 %y, i32 [[AND1]]
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; CHECK-NEXT: ret i32 [[Y_AND1]]
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;
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%and = and i32 %x, 8
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%cmp = icmp eq i32 %and, 0
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%and1 = and i32 %y, -9
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%y.and1 = select i1 %cmp, i32 %y, i32 %and1
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ret i32 %y.and1
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}
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define i64 @select_icmp_x_and_8_eq_0_y64_and_not_8(i32 %x, i64 %y) {
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; CHECK-LABEL: @select_icmp_x_and_8_eq_0_y64_and_not_8(
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; CHECK-NEXT: [[AND:%.*]] = and i32 %x, 8
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[AND]], 0
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; CHECK-NEXT: [[AND1:%.*]] = and i64 %y, -9
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; CHECK-NEXT: [[Y_AND1:%.*]] = select i1 [[CMP]], i64 %y, i64 [[AND1]]
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; CHECK-NEXT: ret i64 [[Y_AND1]]
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;
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%and = and i32 %x, 8
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%cmp = icmp eq i32 %and, 0
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%and1 = and i64 %y, -9
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%y.and1 = select i1 %cmp, i64 %y, i64 %and1
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ret i64 %y.and1
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}
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define i64 @select_icmp_x_and_8_ne_0_y64_and_not_8(i32 %x, i64 %y) {
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; CHECK-LABEL: @select_icmp_x_and_8_ne_0_y64_and_not_8(
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; CHECK-NEXT: [[AND:%.*]] = and i32 %x, 8
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[AND]], 0
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; CHECK-NEXT: [[AND1:%.*]] = and i64 %y, -9
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; CHECK-NEXT: [[AND1_Y:%.*]] = select i1 [[CMP]], i64 [[AND1]], i64 %y
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; CHECK-NEXT: ret i64 [[AND1_Y]]
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;
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%and = and i32 %x, 8
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%cmp = icmp eq i32 %and, 0
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%and1 = and i64 %y, -9
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%and1.y = select i1 %cmp, i64 %and1, i64 %y
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ret i64 %and1.y
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}
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; Don't crash on a pointer or aggregate type.
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define i32* @select_icmp_pointers(i32* %x, i32* %y) {
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; CHECK-LABEL: @select_icmp_pointers(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32* %x, null
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32* %x, i32* %y
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; CHECK-NEXT: ret i32* [[SEL]]
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;
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%cmp = icmp slt i32* %x, null
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%sel = select i1 %cmp, i32* %x, i32* %y
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ret i32* %sel
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}
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; If the condition is known, we don't need to select, but we're not
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; doing this fold here to avoid compile-time cost.
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declare void @llvm.assume(i1)
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define i8 @assume_sel_cond(i1 %cond, i8 %x, i8 %y) {
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; CHECK-LABEL: @assume_sel_cond(
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; CHECK-NEXT: call void @llvm.assume(i1 %cond)
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; CHECK-NEXT: [[SEL:%.*]] = select i1 %cond, i8 %x, i8 %y
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|
; CHECK-NEXT: ret i8 [[SEL]]
|
|
;
|
|
call void @llvm.assume(i1 %cond)
|
|
%sel = select i1 %cond, i8 %x, i8 %y
|
|
ret i8 %sel
|
|
}
|
|
|
|
define i8 @do_not_assume_sel_cond(i1 %cond, i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @do_not_assume_sel_cond(
|
|
; CHECK-NEXT: [[NOTCOND:%.*]] = icmp eq i1 %cond, false
|
|
; CHECK-NEXT: call void @llvm.assume(i1 [[NOTCOND]])
|
|
; CHECK-NEXT: [[SEL:%.*]] = select i1 %cond, i8 %x, i8 %y
|
|
; CHECK-NEXT: ret i8 [[SEL]]
|
|
;
|
|
%notcond = icmp eq i1 %cond, false
|
|
call void @llvm.assume(i1 %notcond)
|
|
%sel = select i1 %cond, i8 %x, i8 %y
|
|
ret i8 %sel
|
|
}
|
|
|