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3559e5b2b3
If it's safe to clobber the condition flags, we can do a few extra things: it's then possible to reset the base register writeback using a SUBS, so we can try to merge even if the base register isn't dead after the merged instruction. This is effectively a (heavily bug-fixed) rewrite of r208992. llvm-svn: 218386
18 lines
432 B
LLVM
18 lines
432 B
LLVM
; RUN: llc < %s -mtriple=thumbv6m-eabi -verify-machineinstrs -o - | FileCheck %s
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define void @foo(i32* %A) #0 {
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entry:
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; CHECK-LABEL: foo:
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; CHECK: push {r7, lr}
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; CHECK: ldm
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; CHECK-NEXT: subs
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; CHECK-NEXT: bl
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%0 = load i32* %A, align 4
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%arrayidx1 = getelementptr inbounds i32* %A, i32 1
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%1 = load i32* %arrayidx1, align 4
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tail call void @bar(i32* %A, i32 %0, i32 %1) #2
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ret void
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}
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declare void @bar(i32*, i32, i32) #1
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