forked from OSchip/llvm-project
71 lines
1.6 KiB
LLVM
71 lines
1.6 KiB
LLVM
|
; RUN: opt -S -gvn-hoist < %s | FileCheck %s
|
||
|
|
; CHECK-LABEL: build_tree
|
||
|
|
; CHECK: load
|
||
|
|
; CHECK: load
|
||
|
|
; Check that the load is not hoisted because the call can potentially
|
||
|
|
; modify the global
|
||
|
|
|
||
|
|
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
|
||
|
|
|
||
|
|
@heap = external global i32, align 4
|
||
|
|
|
||
|
|
define i32 @build_tree() unnamed_addr {
|
||
|
|
entry:
|
||
|
|
br label %do.body
|
||
|
|
|
||
|
|
do.body: ; preds = %do.body, %entry
|
||
|
|
%tmp9 = load i32, i32* @heap, align 4
|
||
|
|
%cmp = call i1 @pqdownheap(i32 %tmp9)
|
||
|
|
br i1 %cmp, label %do.body, label %do.end
|
||
|
|
|
||
|
|
do.end: ; preds = %do.body
|
||
|
|
%tmp20 = load i32, i32* @heap, align 4
|
||
|
|
ret i32 %tmp20
|
||
|
|
}
|
||
|
|
|
||
|
|
declare i1 @pqdownheap(i32)
|
||
|
|
|
||
|
|
@i = external hidden unnamed_addr global i32, align 4
|
||
|
|
@j = external hidden unnamed_addr global [573 x i32], align 4
|
||
|
|
@v = external global i1
|
||
|
|
|
||
|
|
; CHECK-LABEL: test
|
||
|
|
; CHECK-LABEL: do.end
|
||
|
|
; CHECK: load
|
||
|
|
; Check that the load is not hoisted because the call can potentially
|
||
|
|
; modify the global
|
||
|
|
|
||
|
|
define i32 @test() {
|
||
|
|
entry:
|
||
|
|
br label %for.cond
|
||
|
|
|
||
|
|
for.cond:
|
||
|
|
%a3 = load volatile i1, i1* @v
|
||
|
|
br i1 %a3, label %for.body, label %while.end
|
||
|
|
|
||
|
|
for.body:
|
||
|
|
br label %if.then
|
||
|
|
|
||
|
|
if.then:
|
||
|
|
%tmp4 = load i32, i32* @i, align 4
|
||
|
|
br label %for.cond
|
||
|
|
|
||
|
|
while.end:
|
||
|
|
br label %do.body
|
||
|
|
|
||
|
|
do.body:
|
||
|
|
%tmp9 = load i32, i32* getelementptr inbounds ([573 x i32], [573 x i32]* @j,
|
||
|
|
i32 0, i32 1), align 4
|
||
|
|
%tmp10 = load i32, i32* @i, align 4
|
||
|
|
call void @fn()
|
||
|
|
%a1 = load volatile i1, i1* @v
|
||
|
|
br i1 %a1, label %do.body, label %do.end
|
||
|
|
|
||
|
|
do.end:
|
||
|
|
%tmp20 = load i32, i32* getelementptr inbounds ([573 x i32], [573 x i32]* @j,
|
||
|
|
i32 0, i32 1), align 4
|
||
|
|
ret i32 %tmp20
|
||
|
|
}
|
||
|
|
|
||
|
|
declare void @fn()
|