56 lines
1.5 KiB
LLVM
56 lines
1.5 KiB
LLVM
|
; RUN: opt -basic-aa -gvn -S < %s | FileCheck %s
|
||
|
|
@y = external global i32
|
||
|
|
@z = external global i32
|
||
|
|
|
||
|
|
; Function Attrs: nounwind ssp uwtable
|
||
|
|
define void @foo(i32 %x) {
|
||
|
|
; CHECK: @foo(i32 %x)
|
||
|
|
; CHECK: %.pre = load i32, i32* @y
|
||
|
|
; CHECK: call void @bar(i32 %.pre)
|
||
|
|
|
||
|
|
%t = sub i32 %x, %x
|
||
|
|
%.pre = load i32, i32* @y, align 4
|
||
|
|
%cmp = icmp sgt i32 %t, 2
|
||
|
|
br i1 %cmp, label %if.then, label %entry.if.end_crit_edge
|
||
|
|
|
||
|
|
entry.if.end_crit_edge: ; preds = %entry
|
||
|
|
br label %if.end
|
||
|
|
|
||
|
|
if.then: ; preds = %entry
|
||
|
|
%add = add nsw i32 %x, 3
|
||
|
|
store i32 %add, i32* @y, align 4
|
||
|
|
br label %if.end
|
||
|
|
|
||
|
|
if.end: ; preds = %entry.if.end_crit_edge, %if.then
|
||
|
|
%1 = phi i32 [ %.pre, %entry.if.end_crit_edge ], [ %add, %if.then ]
|
||
|
|
tail call void @bar(i32 %1)
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
define void @foo2(i32 %x) {
|
||
|
|
; CHECK: @foo2(i32 %x)
|
||
|
|
; CHECK: %.pre = load i32, i32* @y
|
||
|
|
; CHECK: tail call void @bar(i32 %.pre)
|
||
|
|
entry:
|
||
|
|
%t = sub i32 %x, %x
|
||
|
|
%.pre = load i32, i32* @y, align 4
|
||
|
|
%cmp = icmp sgt i32 %t, 2
|
||
|
|
br i1 %cmp, label %if.then, label %if.else
|
||
|
|
|
||
|
|
if.then: ; preds = %entry
|
||
|
|
%add = add nsw i32 %x, 3
|
||
|
|
store i32 %add, i32* @y, align 4
|
||
|
|
br label %if.end
|
||
|
|
|
||
|
|
if.else: ; preds = %entry
|
||
|
|
store i32 1, i32* @z, align 4
|
||
|
|
br label %if.end
|
||
|
|
|
||
|
|
if.end: ; preds = %if.else, %if.then
|
||
|
|
%0 = phi i32 [ %.pre, %if.else ], [ %add, %if.then ]
|
||
|
|
tail call void @bar(i32 %0)
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
declare void @bar(i32)
|