mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 04:02:41 +01:00
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
|
|
|
|
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
define i64 @fn2() {
|
|
entry:
|
|
%conv = sext i32 undef to i64
|
|
%div = sdiv i64 8, %conv
|
|
%call2 = call i64 @fn1(i64 %div)
|
|
ret i64 %call2
|
|
}
|
|
|
|
; CHECK-DAG: define i64 @fn2(
|
|
; CHECK: %[[CALL:.*]] = call i64 @fn1(i64 undef)
|
|
|
|
define internal i64 @fn1(i64 %p1) {
|
|
entry:
|
|
%tobool = icmp ne i64 %p1, 0
|
|
%cond = select i1 %tobool, i64 %p1, i64 %p1
|
|
ret i64 %cond
|
|
}
|
|
|
|
; CHECK-DAG: define internal i64 @fn1(
|
|
; CHECK: %[[SEL:.*]] = select i1 undef, i64 undef, i64 undef
|
|
; CHECK: ret i64 %[[SEL]]
|