forked from OSchip/llvm-project
27 lines
904 B
LLVM
27 lines
904 B
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
; Converting the 2 shifts to SHL 6 without the AND is wrong. PR 8547.
|
|
|
|
@g_2 = global i32 0, align 4
|
|
@.str = constant [10 x i8] c"g_2 = %d\0A\00"
|
|
|
|
declare i32 @printf(i8*, ...)
|
|
|
|
define i32 @main() nounwind {
|
|
codeRepl:
|
|
br label %for.cond
|
|
|
|
for.cond: ; preds = %for.cond, %codeRepl
|
|
%storemerge = phi i32 [ 0, %codeRepl ], [ 5, %for.cond ]
|
|
store i32 %storemerge, i32* @g_2, align 4
|
|
%shl = shl i32 %storemerge, 30
|
|
%conv2 = lshr i32 %shl, 24
|
|
; CHECK: %0 = shl nuw nsw i32 %storemerge, 6
|
|
; CHECK: %conv2 = and i32 %0, 64
|
|
%tobool = icmp eq i32 %conv2, 0
|
|
br i1 %tobool, label %for.cond, label %codeRepl2
|
|
|
|
codeRepl2: ; preds = %for.cond
|
|
%call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str, i64 0, i64 0), i32 %conv2) nounwind
|
|
ret i32 0
|
|
}
|