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; RUN: opt -S -loop-sink < %s | FileCheck %s
; RUN: opt -S -verify-memoryssa -enable-mssa-in-legacy-loop-sink -loop-sink < %s | FileCheck %s
; RUN: opt -S -aa-pipeline=basic-aa -passes=loop-sink < %s | FileCheck %s
; RUN: opt -S -verify-memoryssa -enable-mssa-in-loop-sink -aa-pipeline=basic-aa -passes=loop-sink < %s | FileCheck %s
; The load instruction should not be sunk into following loop.
; CHECK: @foo
; CHECK-NEXT: entry
; CHECK-NEXT: %ptr = load i8*, i8** %pp, align 8
; CHECK-NEXT: store i8* null, i8** %pp, align 8
define i32 @foo(i32 %n, i8** %pp) !prof !0 {
entry:
%ptr = load i8*, i8** %pp, align 8
store i8* null, i8** %pp, align 8
br label %for.cond
for.cond: ; preds = %for.body, %entry
%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%cmp = icmp ult i32 %i.0, %n
br i1 %cmp, label %for.body, label %for.end, !prof !1
for.body: ; preds = %for.cond
%0 = sext i32 %i.0 to i64
%arrayidx = getelementptr inbounds i8, i8* %ptr, i64 %0
%1 = load i8, i8* %arrayidx, align 1
%or19 = call i8 @llvm.bitreverse.i8(i8 %1)
%v = sext i8 %or19 to i32
%inc = add i32 %i.0, %v
br label %for.cond
for.end: ; preds = %for.cond
ret i32 %i.0
}
declare i8 @llvm.bitreverse.i8(i8) #0
attributes #0 = { nounwind readnone speculatable }
!0 = !{!"function_entry_count", i64 1}
!1 = !{!"branch_weights", i32 1, i32 2000}
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