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https://github.com/c64scene-ar/llvm-6502.git
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a3fb49cd85
value is zero. This allows optmizations to kick in more easily. Fix some test cases so that they remain meaningful (i.e., not completely dead coded) when optimizations apply. <rdar://problem/14096009> superfluous multiply by high part of zero-extended value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184222 91177308-0d34-0410-b5e6-96231b3b80d8
41 lines
1.2 KiB
LLVM
41 lines
1.2 KiB
LLVM
; RUN: llc < %s -march=x86 -mattr=+cmov | FileCheck %s
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;
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; Test scheduling a multi-use compare. We should neither spill flags
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; nor clone the compare.
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; CHECK: cmp
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; CHECK-NOT: pushf
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; CHECK: cmov
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; CHECK-NOT: cmp
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; CHECK: cmov
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%struct.indexentry = type { i32, i8*, i8*, i8*, i8*, i8* }
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define i32 @_bfd_stab_section_find_nearest_line(i32 %offset, i1 %cond) nounwind {
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entry:
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%tmp910 = add i32 0, %offset ; <i32> [#uses=1]
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br i1 %cond, label %bb951, label %bb917
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bb917: ; preds = %entry
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ret i32 0
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bb951: ; preds = %bb986, %entry
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%tmp955 = sdiv i32 %offset, 2 ; <i32> [#uses=3]
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%tmp961 = getelementptr %struct.indexentry* null, i32 %tmp955, i32 0 ; <i32*> [#uses=1]
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br i1 %cond, label %bb986, label %bb967
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bb967: ; preds = %bb951
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ret i32 0
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bb986: ; preds = %bb951
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%tmp993 = load i32* %tmp961, align 4 ; <i32> [#uses=1]
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%tmp995 = icmp ugt i32 %tmp993, %tmp910 ; <i1> [#uses=2]
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%tmp1002 = add i32 %tmp955, 1 ; <i32> [#uses=1]
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%low.0 = select i1 %tmp995, i32 0, i32 %tmp1002 ; <i32> [#uses=1]
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%high.0 = select i1 %tmp995, i32 %tmp955, i32 0 ; <i32> [#uses=1]
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%tmp1006 = icmp eq i32 %low.0, %high.0 ; <i1> [#uses=1]
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br i1 %tmp1006, label %UnifiedReturnBlock, label %bb951
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UnifiedReturnBlock: ; preds = %bb986
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ret i32 1
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}
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