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32 lines
877 B
LLVM
32 lines
877 B
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s | FileCheck %s
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;
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; Check that the isel does not fold the shld, which already folds a load
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; and has two uses, into a store.
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target triple = "i686-unknown-unknown"
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@A = external global i32
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define i32 @test5(i32 %B, i8 %C) {
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; CHECK-LABEL: test5:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movb {{[0-9]+}}(%esp), %cl
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %edx
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; CHECK-NEXT: movl A, %eax
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; CHECK-NEXT: shldl %cl, %edx, %eax
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; CHECK-NEXT: movl %eax, A
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; CHECK-NEXT: retl
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entry:
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%tmp.1 = load i32, i32* @A
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%shift.upgrd.1 = zext i8 %C to i32
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%tmp.2 = shl i32 %tmp.1, %shift.upgrd.1
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%tmp.3 = sub i8 32, %C
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%shift.upgrd.2 = zext i8 %tmp.3 to i32
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%tmp.4 = lshr i32 %B, %shift.upgrd.2
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%tmp.5 = or i32 %tmp.4, %tmp.2
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store i32 %tmp.5, i32* @A
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ret i32 %tmp.5
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}
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