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7230d61b65
Shifts beyond the bitwidth are undef but SCCP resolved them to zero. Instead, DTRT and resolve them to undef. This reimplements the transform which caused PR27712. llvm-svn: 269269
31 lines
682 B
LLVM
31 lines
682 B
LLVM
; RUN: opt -sccp -S < %s | 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 i32 @main() {
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entry:
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br label %lbl_1154
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lbl_1154:
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%b0.0 = phi i32 [ -119, %entry ], [ 0, %lbl_1154 ]
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%cmp11 = icmp slt i32 %b0.0, 0
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%shl.op = shl i32 33554432, %b0.0
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%cmp1445 = icmp ult i32 %shl.op, 33554432
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%cmp14 = or i1 %cmp11, %cmp1445
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br i1 %cmp14, label %lbl_1154, label %if.end19
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if.end19:
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br i1 %cmp11, label %if.then22, label %cleanup26
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if.then22:
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tail call void @abort()
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unreachable
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cleanup26:
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ret i32 %shl.op
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}
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; CHECK-LABEL: define i32 @main(
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; CHECK-NOT: ret i32 undef
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declare void @abort()
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