derek.holloway
7502bf64a4
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40 lines
1.2 KiB
LLVM
40 lines
1.2 KiB
LLVM
; RUN: llc %s -o - | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "thumbv6m-none-unknown-musleabi"
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@a = global i8 undef, align 4
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; Check that store-merging generates a single str i32 rather than strb+strb+strh,
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; i.e., -1 is not moved by constant-hoisting.
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; CHECK: movs [[R1:r[0-9]+]], #255
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; CHECK: lsls [[R2:r[0-9]+]], [[R1]], #16
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; CHECK: str [[R2]]
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; CHECK: movs [[R3:r[0-9]+]], #255
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; CHECK: lsls [[R4:r[0-9]+]], [[R3]], #16
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; CHECK: str [[R4]]
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; CHECK-NOT: strh
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; CHECK-NOT: strb
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define void @ham() {
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bb:
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br i1 undef, label %bb1, label %bb2
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bb1:
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store i8 0, ptr getelementptr inbounds (i8, ptr @a, i32 1), align 1
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store i8 0, ptr @a, align 4
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store i8 -1, ptr getelementptr inbounds (i8, ptr @a, i32 2), align 2
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store i8 0, ptr getelementptr inbounds (i8, ptr @a, i32 3), align 1
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br label %bb3
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bb2:
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store i8 0, ptr getelementptr inbounds (i8, ptr @a, i32 9), align 1
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store i8 0, ptr getelementptr inbounds (i8, ptr @a, i32 8), align 4
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store i8 -1, ptr getelementptr inbounds (i8, ptr @a, i32 10), align 2
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store i8 0, ptr getelementptr inbounds (i8, ptr @a, i32 11), align 1
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br label %bb3
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bb3:
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ret void
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}
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