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https://github.com/c64scene-ar/llvm-6502.git
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899eaa3569
Optimize trivial branches in CodeGenPrepare, which often get created from the lowering of objectsize intrinsics. Unfortunately, a number of tests were relying on llc not optimizing trivial branches, so I had to add an option to allow them to continue to test what they originally tested. This fixes <rdar://problem/8785296> and <rdar://problem/9112893>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127498 91177308-0d34-0410-b5e6-96231b3b80d8
64 lines
1.4 KiB
LLVM
64 lines
1.4 KiB
LLVM
; RUN: llc < %s -march=x86 -disable-cgp-branch-opts | FileCheck %s -check-prefix=32
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; RUN: llc < %s -march=x86-64 -disable-cgp-branch-opts | FileCheck %s -check-prefix=64
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; rdar://7573216
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; PR6146
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define i32 @t1(i32 %x) nounwind readnone ssp {
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entry:
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; 32: t1:
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; 32: cmpl $1
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; 32: sbbl
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; 64: t1:
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; 64: cmpl $1
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; 64: sbbl
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%0 = icmp eq i32 %x, 0
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%iftmp.0.0 = select i1 %0, i32 -1, i32 0
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ret i32 %iftmp.0.0
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}
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define i32 @t2(i32 %x) nounwind readnone ssp {
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entry:
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; 32: t2:
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; 32: cmpl $1
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; 32: sbbl
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; 64: t2:
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; 64: cmpl $1
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; 64: sbbl
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%0 = icmp eq i32 %x, 0
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%iftmp.0.0 = sext i1 %0 to i32
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ret i32 %iftmp.0.0
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}
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%struct.zbookmark = type { i64, i64 }
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%struct.zstream = type { }
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define i32 @t3() nounwind readonly {
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entry:
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; 32: t3:
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; 32: cmpl $1
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; 32: sbbl
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; 32: cmpl
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; 32: xorl
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; 64: t3:
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; 64: cmpl $1
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; 64: sbbq
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; 64: cmpq
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; 64: xorl
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%not.tobool = icmp eq i32 undef, 0 ; <i1> [#uses=2]
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%cond = sext i1 %not.tobool to i32 ; <i32> [#uses=1]
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%conv = sext i1 %not.tobool to i64 ; <i64> [#uses=1]
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%add13 = add i64 0, %conv ; <i64> [#uses=1]
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%cmp = icmp ult i64 undef, %add13 ; <i1> [#uses=1]
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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br label %if.end
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if.end: ; preds = %if.then, %entry
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%xor27 = xor i32 undef, %cond ; <i32> [#uses=0]
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ret i32 0
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}
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