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Instcombine now helps out with these 

llvm-svn: 16405
This commit is contained in:
Chris Lattner 2004-09-19 18:45:45 +00:00
parent f62ea8ef4b
commit 2f7bb1be42
2 changed files with 7 additions and 4 deletions
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6
llvm/test/Regression/Transforms/ScalarRepl/phinodepromote.ll
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@ -1,4 +1,4 @@
; RUN: llvm-as < %s | opt -mem2reg | llvm-dis | not grep alloca ; RUN: llvm-as < %s | opt -instcombine -mem2reg | llvm-dis | not grep alloca
; ;
; This tests to see if mem2reg can promote alloca instructions whose addresses ; 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 ; are used by PHI nodes that are immediately loaded. The LLVM C++ front-end
@ -6,12 +6,14 @@
; lvalues), so handling this simple extension is quite useful. ; lvalues), so handling this simple extension is quite useful.
; ;
; This testcase is what the following program looks like when it reaches ; This testcase is what the following program looks like when it reaches
; mem2reg: ; instcombine:
; ;
; template<typename T> ; template<typename T>
; const T& max(const T& a1, const T& a2) { return a1 < a2 ? a1 : a2; } ; const T& max(const T& a1, const T& a2) { return a1 < a2 ? a1 : a2; }
; int main() { return max(0, 1); } ; int main() { return max(0, 1); }
; ;
; This test checks to make sure the combination of instcombine and mem2reg
; perform the transformation.
int %main() { int %main() {
entry: entry:

5
llvm/test/Regression/Transforms/ScalarRepl/select_promote.ll
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@ -1,6 +1,7 @@
; Test promotion of loads that use the result of a select instruction. ; Test promotion of loads that use the result of a select instruction. This
; should be simplified by the instcombine pass.
; RUN: llvm-as < %s | opt -mem2reg | llvm-dis | not grep alloca ; RUN: llvm-as < %s | opt -instcombine -mem2reg | llvm-dis | not grep alloca
int %main() { int %main() {
%mem_tmp.0 = alloca int ; <int*> [#uses=3] %mem_tmp.0 = alloca int ; <int*> [#uses=3]