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6912fe6f35
After converting a loop to a hardware loop, the pass should remove any unnecessary instructions from the old compare-and-branch code. This patch removes a dead constant assignment that was used in the compare instruction. Differential Revision: http://reviews.llvm.org/D9720 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237373 91177308-0d34-0410-b5e6-96231b3b80d8
24 lines
554 B
LLVM
24 lines
554 B
LLVM
; RUN: llc -march=hexagon -mcpu=hexagonv5 -O2 -disable-block-placement=0 < %s | FileCheck %s
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; Test that there is no redundant register assignment in the hardware loop
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; preheader.
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; CHECK-NOT: r{{.*}} = #5
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@g = external global i32
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define void @foo() #0 {
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entry:
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br i1 undef, label %if.end38, label %for.body
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for.body:
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%loopIdx.051 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
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store i32 1, i32* @g, align 4
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%inc = add i32 %loopIdx.051, 1
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%cmp9 = icmp ult i32 %inc, 5
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br i1 %cmp9, label %for.body, label %if.end38
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if.end38:
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ret void
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}
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