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2296864d81
We marked values which are 'undef' as constant instead of undefined which violates SCCP's invariants. If we can figure out that a computation results in 'undef', leave it in the undefined state. This fixes PR16052. llvm-svn: 257102
27 lines
633 B
LLVM
27 lines
633 B
LLVM
; RUN: opt < %s -S -ipsccp | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i64 @fn2() {
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entry:
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%conv = sext i32 undef to i64
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%div = sdiv i64 8, %conv
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%call2 = call i64 @fn1(i64 %div)
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ret i64 %call2
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}
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; CHECK-DAG: define i64 @fn2(
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; CHECK: %[[CALL:.*]] = call i64 @fn1(i64 undef)
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define internal i64 @fn1(i64 %p1) {
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entry:
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%tobool = icmp ne i64 %p1, 0
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%cond = select i1 %tobool, i64 %p1, i64 %p1
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ret i64 %cond
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}
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; CHECK-DAG: define internal i64 @fn1(
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; CHECK: %[[SEL:.*]] = select i1 undef, i64 undef, i64 undef
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; CHECK: ret i64 %[[SEL]]
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