forked from OSchip/llvm-project
27 lines
854 B
LLVM
27 lines
854 B
LLVM
; RUN: opt -instcombine -o - -S %s | FileCheck %s
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; The constant at %v35 should be shrunk, but this must lead to the nsw flag of
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; %v43 getting removed so that %v44 is not illegally optimized away.
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; CHECK-LABEL: @foo
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; CHECK: %v35 = add nuw nsw i32 %v34, 1362915575
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; ...
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; CHECK: add nuw i32 %v42, 1533579450
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; CHECK-NEXT: %v44 = or i32 %v43, -2147483648
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; CHECK-NEXT: %v45 = xor i32 %v44, 749011377
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; CHECK-NEXT: ret i32 %v45
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define i32 @foo(i32 %arg) {
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%v33 = and i32 %arg, 223
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%v34 = xor i32 %v33, 29
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%v35 = add nuw i32 %v34, 3510399223
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%v37 = or i32 %v34, 1874836915
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%v38 = and i32 %v34, 221
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%v39 = xor i32 %v38, 1874836915
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%v40 = xor i32 %v37, %v39
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%v41 = shl nsw nuw i32 %v40, 1
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%v42 = sub i32 %v35, %v41
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%v43 = add nsw i32 %v42, 1533579450
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%v44 = or i32 %v43, -2147483648
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%v45 = xor i32 %v44, 749011377
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ret i32 %v45
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}
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