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650c315835
This reverts r369664 (git commit 51f48295cbe8fa3a44db263b528dd9f7bae7bf9a) It causes many benchmark regressions, internally and in llvm's benchmark suite. llvm-svn: 370398
42 lines
1.1 KiB
LLVM
42 lines
1.1 KiB
LLVM
; RUN: llc < %s -mtriple=thumbv7-apple-darwin10 -relocation-model=pic -frame-pointer=all -mcpu=cortex-a8 | FileCheck %s
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; subs r4, #1
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; cmp r4, 0
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; bgt
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; cmp cannot be optimized away since it will clear the overflow bit.
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; gt / ge, lt, le conditions all depend on V bit.
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; rdar://9172742
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define i32 @t() nounwind {
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; CHECK-LABEL: t:
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entry:
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br label %bb2
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bb: ; preds = %bb2
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%0 = tail call i32 @rand() nounwind
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%1 = icmp eq i32 %0, 50
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br i1 %1, label %bb3, label %bb1
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bb1: ; preds = %bb
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; CHECK: bb1
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; CHECK: subs [[REG:r[0-9]+]], #1
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%tmp = tail call i32 @puts() nounwind
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%indvar.next = add i32 %indvar, 1
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br label %bb2
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bb2: ; preds = %bb1, %entry
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; CHECK: cmp [[REG]], #0
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; CHECK: bgt
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%indvar = phi i32 [ %indvar.next, %bb1 ], [ 0, %entry ]
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%tries.0 = sub i32 2147483647, %indvar
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%tmp1 = icmp sgt i32 %tries.0, 0
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br i1 %tmp1, label %bb, label %bb3
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bb3: ; preds = %bb2, %bb
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ret i32 0
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}
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declare i32 @rand()
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declare i32 @puts() nounwind
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