forked from OSchip/llvm-project
41 lines
1.4 KiB
LLVM
41 lines
1.4 KiB
LLVM
; 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}
|