[llvm-commits] CVS: llvm/test/Regression/Transforms/Mem2Reg/2005-06-30-ReadBeforeWrite.ll

[Chris Lattner]

Changes in directory llvm/test/Regression/Transforms/Mem2Reg:

2005-06-30-ReadBeforeWrite.ll added (r1.1)
---
Log message:

new testcase for PR590: http://llvm.cs.uiuc.edu/PR590 


---
Diffs of the changes:  (+51 -0)

 2005-06-30-ReadBeforeWrite.ll |   51 ++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 51 insertions(+)


Index: llvm/test/Regression/Transforms/Mem2Reg/2005-06-30-ReadBeforeWrite.ll
diff -c /dev/null llvm/test/Regression/Transforms/Mem2Reg/2005-06-30-ReadBeforeWrite.ll:1.1
*** /dev/null	Thu Jun 30 02:29:04 2005
--- llvm/test/Regression/Transforms/Mem2Reg/2005-06-30-ReadBeforeWrite.ll	Thu Jun 30 02:28:54 2005
***************
*** 0 ****
--- 1,51 ----
+ ; RUN: llvm-as < %s | opt -mem2reg -instcombine | llvm-dis | grep store
+ ; PR590
+ 
+ void %zero(sbyte* %p, int %n) {
+ entry:
+ 	%p_addr = alloca sbyte*		; <sbyte**> [#uses=2]
+ 	%n_addr = alloca int		; <int*> [#uses=2]
+ 	%i = alloca int		; <int*> [#uses=6]
+ 	%out = alloca int		; <int*> [#uses=2]
+ 	%undef = alloca int		; <int*> [#uses=2]
+ 	store sbyte* %p, sbyte** %p_addr
+ 	store int %n, int* %n_addr
+ 	store int 0, int* %i
+ 	br label %loopentry
+ 
+ loopentry:		; preds = %endif, %entry
+ 	%tmp.0 = load int* %n_addr		; <int> [#uses=1]
+ 	%tmp.1 = add int %tmp.0, 1		; <int> [#uses=1]
+ 	%tmp.2 = load int* %i		; <int> [#uses=1]
+ 	%tmp.3 = setgt int %tmp.1, %tmp.2		; <bool> [#uses=2]
+ 	%tmp.4 = cast bool %tmp.3 to int		; <int> [#uses=0]
+ 	br bool %tmp.3, label %no_exit, label %return
+ 
+ no_exit:		; preds = %loopentry
+ 	%tmp.5 = load int* %undef		; <int> [#uses=1]
+ 	store int %tmp.5, int* %out
+ 	store int 0, int* %undef
+ 	%tmp.6 = load int* %i		; <int> [#uses=1]
+ 	%tmp.7 = setgt int %tmp.6, 0		; <bool> [#uses=2]
+ 	%tmp.8 = cast bool %tmp.7 to int		; <int> [#uses=0]
+ 	br bool %tmp.7, label %then, label %endif
+ 
+ then:		; preds = %no_exit
+ 	%tmp.9 = load sbyte** %p_addr		; <sbyte*> [#uses=1]
+ 	%tmp.10 = load int* %i		; <int> [#uses=1]
+ 	%tmp.11 = sub int %tmp.10, 1		; <int> [#uses=1]
+ 	%tmp.12 = getelementptr sbyte* %tmp.9, int %tmp.11		; <sbyte*> [#uses=1]
+ 	%tmp.13 = load int* %out		; <int> [#uses=1]
+ 	%tmp.14 = cast int %tmp.13 to sbyte		; <sbyte> [#uses=1]
+ 	store sbyte %tmp.14, sbyte* %tmp.12
+ 	br label %endif
+ 
+ endif:		; preds = %then, %no_exit
+ 	%tmp.15 = load int* %i		; <int> [#uses=1]
+ 	%inc = add int %tmp.15, 1		; <int> [#uses=1]
+ 	store int %inc, int* %i
+ 	br label %loopentry
+ 
+ return:		; preds = %loopentry
+ 	ret void
+ }