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dce0498b16
The fix for PR23999 made us mark loads of null as producing the constant undef which upsets the lattice. Instead, keep the load as "undefined". This fixes PR26044. llvm-svn: 257087
32 lines
903 B
LLVM
32 lines
903 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 void @fn2() {
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entry:
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br label %if.end
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for.cond1: ; preds = %if.end, %for.end
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br i1 undef, label %if.end, label %if.end
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if.end: ; preds = %lbl, %for.cond1
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%e.2 = phi i32* [ undef, %entry ], [ null, %for.cond1 ], [ null, %for.cond1 ]
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%0 = load i32, i32* %e.2, align 4
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%call = call i32 @fn1(i32 %0)
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br label %for.cond1
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}
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define internal i32 @fn1(i32 %p1) {
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entry:
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%tobool = icmp ne i32 %p1, 0
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%cond = select i1 %tobool, i32 %p1, i32 %p1
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ret i32 %cond
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}
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; CHECK-LABEL: define void @fn2(
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; CHECK: call i32 @fn1(i32 undef)
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; CHECK-LABEL: define internal i32 @fn1(
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; CHECK:%[[COND:.*]] = select i1 undef, i32 undef, i32 undef
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; CHECK: ret i32 %[[COND]]
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