Changes in directory llvm/test/Transforms/InstCombine:
2007-02-01-LoadSinkAlloca.ll added (r1.1)
---
Log message:
new testcase for serious code pessimization
---
Diffs of the changes: (+43 -0)
2007-02-01-LoadSinkAlloca.ll | 43 +++++++++++++++++++++++++++++++++++++++++++
1 files changed, 43 insertions(+)
Index: llvm/test/Transforms/InstCombine/2007-02-01-LoadSinkAlloca.ll
diff -c /dev/null
llvm/test/Transforms/InstCombine/2007-02-01-LoadSinkAlloca.ll:1.1
*** /dev/null Thu Feb 1 16:29:36 2007
--- llvm/test/Transforms/InstCombine/2007-02-01-LoadSinkAlloca.ll Thu Feb
1 16:29:26 2007
***************
*** 0 ****
--- 1,43 ----
+ ; RUN: llvm-as < %s | opt -instcombine -mem2reg | llvm-dis | grep '%A =
alloca' &&
+ ; RUN: llvm-as < %s | opt -instcombine -mem2reg | llvm-dis | not grep '%B =
alloca'
+
+ ; Ensure that instcombine doesn't sink the loads in entry/cond_true into
+ ; cond_next. Doing so prevents mem2reg from promoting the B alloca.
+
+ define i32 @test2(i32 %C) {
+ entry:
+ %A = alloca i32
+ %B = alloca i32
+ %tmp = call i32 (...)* @bar( i32* %A ) ; <i32> [#uses=0]
+ %T = load i32* %A ; <i32> [#uses=1]
+ %tmp = icmp eq i32 %C, 0 ; <i1> [#uses=1]
+ br i1 %tmp, label %cond_next, label %cond_true
+
+ cond_true: ; preds = %entry
+ store i32 123, i32* %B
+ call i32 @test2( i32 123 ) ; <i32>:0 [#uses=0]
+ %T1 = load i32* %B ; <i32> [#uses=1]
+ br label %cond_next
+
+ cond_next: ; preds = %cond_true, %entry
+ %tmp1.0 = phi i32 [ %T1, %cond_true ], [ %T, %entry ] ; <i32>
[#uses=1]
+ %tmp7 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
+ %tmp8 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
+ %tmp9 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
+ %tmp10 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
+ %tmp11 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
+ %tmp12 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
+ %tmp13 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
+ %tmp14 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
+ %tmp15 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
+ %tmp16 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
+ %tmp17 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
+ %tmp18 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
+ %tmp19 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
+ %tmp20 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
+ ret i32 %tmp1.0
+ }
+
+ declare i32 @bar(...)
+
+ declare i32 @baq(...)
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