mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-01 16:33:37 +01:00
205b641954
input filename so that opt doesn't print the input filename in the output so that grep lines in the tests don't unintentionally match strings in the input filename. llvm-svn: 81537
35 lines
1.3 KiB
LLVM
35 lines
1.3 KiB
LLVM
; RUN: opt < %s -simplifycfg -instcombine -mem2reg -S | not grep alloca
|
|
;
|
|
; This tests to see if mem2reg can promote alloca instructions whose addresses
|
|
; are used by PHI nodes that are immediately loaded. The LLVM C++ front-end
|
|
; often generates code that looks like this (when it codegen's ?: exprs as
|
|
; lvalues), so handling this simple extension is quite useful.
|
|
;
|
|
; This testcase is what the following program looks like when it reaches
|
|
; instcombine:
|
|
;
|
|
; template<typename T>
|
|
; const T& max(const T& a1, const T& a2) { return a1 < a2 ? a1 : a2; }
|
|
; int main() { return max(0, 1); }
|
|
;
|
|
; This test checks to make sure the combination of instcombine and mem2reg
|
|
; perform the transformation.
|
|
|
|
define i32 @main() {
|
|
entry:
|
|
%mem_tmp.0 = alloca i32 ; <i32*> [#uses=3]
|
|
%mem_tmp.1 = alloca i32 ; <i32*> [#uses=3]
|
|
store i32 0, i32* %mem_tmp.0
|
|
store i32 1, i32* %mem_tmp.1
|
|
%tmp.1.i = load i32* %mem_tmp.1 ; <i32> [#uses=1]
|
|
%tmp.3.i = load i32* %mem_tmp.0 ; <i32> [#uses=1]
|
|
%tmp.4.i = icmp sle i32 %tmp.1.i, %tmp.3.i ; <i1> [#uses=1]
|
|
br i1 %tmp.4.i, label %cond_true.i, label %cond_continue.i
|
|
cond_true.i: ; preds = %entry
|
|
br label %cond_continue.i
|
|
cond_continue.i: ; preds = %cond_true.i, %entry
|
|
%mem_tmp.i.0 = phi i32* [ %mem_tmp.1, %cond_true.i ], [ %mem_tmp.0, %entry ] ; <i32*> [#uses=1]
|
|
%tmp.3 = load i32* %mem_tmp.i.0 ; <i32> [#uses=1]
|
|
ret i32 %tmp.3
|
|
}
|