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ba8cd33738
analysis. We're already using TTI in SimplifyCFG, so remove the hard-baked "cheapness" heuristic and use TTI directly. Generally NFC intended, but we're using a slightly different heuristic now so there is a slight test churn. Test changes: * combine-comparisons-by-cse.ll: Removed unneeded branch check. * 2014-08-04-muls-it.ll: Test now doesn't branch but emits muleq. * coalesce-subregs.ll: Superfluous block check. * 2008-01-02-hoist-fp-add.ll: fadd is safe to speculate. Change to udiv. * PhiBlockMerge.ll: Superfluous CFG checking code. Main checks still present. * select-gep.ll: A variable GEP is not expensive, just TCC_Basic, according to the TTI. llvm-svn: 228826
22 lines
491 B
LLVM
22 lines
491 B
LLVM
; RUN: opt -S -simplifycfg < %s | FileCheck %s
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%ST = type { i8, i8 }
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define i8* @test1(%ST* %x, i8* %y) nounwind {
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entry:
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%cmp = icmp eq %ST* %x, null
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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%incdec.ptr = getelementptr %ST* %x, i32 0, i32 1
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br label %if.end
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if.end:
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%x.addr = phi i8* [ %incdec.ptr, %if.then ], [ %y, %entry ]
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ret i8* %x.addr
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; CHECK-LABEL: @test1(
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; CHECK: %incdec.ptr.y = select i1 %cmp, i8* %incdec.ptr, i8* %y
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; CHECK: ret i8* %incdec.ptr.y
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}
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