46 lines
1.3 KiB
LLVM
46 lines
1.3 KiB
LLVM
; Tests to make sure elimination of casts is working correctly
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; RUN: opt < %s -instcombine -S | FileCheck %s
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define i64 @test_sext_zext(i16 %A) {
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%c1 = zext i16 %A to i32 ; <i32> [#uses=1]
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%c2 = sext i32 %c1 to i64 ; <i64> [#uses=1]
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ret i64 %c2
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; CHECK-LABEL: @test_sext_zext
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; CHECK-NOT: %c1
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; CHECK: %c2 = zext i16 %A to i64
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; CHECK: ret i64 %c2
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}
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define <2 x i64> @test2(<2 x i1> %A) {
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%xor = xor <2 x i1> %A, <i1 true, i1 true>
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%zext = zext <2 x i1> %xor to <2 x i64>
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ret <2 x i64> %zext
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; CHECK-LABEL: @test2
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; CHECK-NEXT: zext <2 x i1> %A to <2 x i64>
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; CHECK-NEXT: xor <2 x i64> %1, <i64 1, i64 1>
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}
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define <2 x i64> @test3(<2 x i64> %A) {
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%trunc = trunc <2 x i64> %A to <2 x i32>
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%and = and <2 x i32> %trunc, <i32 23, i32 42>
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%zext = zext <2 x i32> %and to <2 x i64>
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ret <2 x i64> %zext
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; CHECK-LABEL: @test3
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; CHECK-NEXT: and <2 x i64> %A, <i64 23, i64 42>
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}
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define <2 x i64> @test4(<2 x i64> %A) {
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%trunc = trunc <2 x i64> %A to <2 x i32>
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%and = and <2 x i32> %trunc, <i32 23, i32 42>
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%xor = xor <2 x i32> %and, <i32 23, i32 42>
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%zext = zext <2 x i32> %xor to <2 x i64>
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ret <2 x i64> %zext
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; CHECK-LABEL: @test4
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; CHECK-NEXT: xor <2 x i64> %A, <i64 4294967295, i64 4294967295>
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; CHECK-NEXT: and <2 x i64> %1, <i64 23, i64 42>
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}
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