forked from OSchip/llvm-project
29 lines
1.2 KiB
LLVM
29 lines
1.2 KiB
LLVM
; RUN: llc < %s -verify-machineinstrs | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-darwin10.0.0"
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; This test exercises the alias checking in SimpleRegisterCoalescing::RemoveCopyByCommutingDef.
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define void @f(i32* %w, i32* %h, i8* %_this, i8* %image) nounwind ssp {
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%x1 = tail call i64 @g(i8* %_this, i8* %image) nounwind ; <i64> [#uses=3]
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%tmp1 = trunc i64 %x1 to i32 ; <i32> [#uses=1]
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; CHECK: movl (%r{{.*}}), %
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%x4 = load i32, i32* %h, align 4 ; <i32> [#uses=1]
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; The imull clobbers a 32-bit register.
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; CHECK: imull %{{...}}, %e[[CLOBBER:..]]
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%x5 = mul nsw i32 %x4, %tmp1 ; <i32> [#uses=1]
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; So we cannot use the corresponding 64-bit register anymore.
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; CHECK-NOT: shrq $32, %r[[CLOBBER]]
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%btmp3 = lshr i64 %x1, 32 ; <i64> [#uses=1]
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%btmp4 = trunc i64 %btmp3 to i32 ; <i32> [#uses=1]
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; CHECK: idiv
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%x6 = sdiv i32 %x5, %btmp4 ; <i32> [#uses=1]
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store i32 %x6, i32* %w, align 4
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ret void
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}
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declare i64 @g(i8*, i8*)
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