[llvm-commits] CVS: llvm/test/Regression/Transforms/InstCombine/CPP_min_max.llx

[Chris Lattner]

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

CPP_min_max.llx added (r1.1)
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Log message:

New testcase for PR362: http://llvm.cs.uiuc.edu/PR362 : Icky code generated for std::min/std::max


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Diffs of the changes:  (+34 -0)

Index: llvm/test/Regression/Transforms/InstCombine/CPP_min_max.llx
diff -c /dev/null llvm/test/Regression/Transforms/InstCombine/CPP_min_max.llx:1.1
*** /dev/null	Sun Sep 19 14:17:20 2004
--- llvm/test/Regression/Transforms/InstCombine/CPP_min_max.llx	Sun Sep 19 14:17:10 2004
***************
*** 0 ****
--- 1,34 ----
+ ; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep select | not grep 'int\*'
+ 
+ ; This testcase corresponds to PR362, which notices that this horrible code
+ ; is generated by the C++ front-end and LLVM optimizers, which has lots of
+ ; loads and other stuff that are unneeded.
+ ;
+ ; Instcombine should propagate the load through the select instructions to
+ ; allow elimination of the extra stuff by the mem2reg pass.
+ 
+ implementation   ; Functions:
+ 
+ void %_Z5test1RiS_(int* %x, int* %y) {
+ entry:
+ 	%tmp.1.i = load int* %y		; <int> [#uses=1]
+ 	%tmp.3.i = load int* %x		; <int> [#uses=1]
+ 	%tmp.4.i = setlt int %tmp.1.i, %tmp.3.i		; <bool> [#uses=1]
+ 	%retval.i = select bool %tmp.4.i, int* %y, int* %x		; <int*> [#uses=1]
+ 	%tmp.4 = load int* %retval.i		; <int> [#uses=1]
+ 	store int %tmp.4, int* %x
+ 	ret void
+ }
+ 
+ void %_Z5test2RiS_(int* %x, int* %y) {
+ entry:
+ 	%tmp.0 = alloca int		; <int*> [#uses=2]
+ 	%tmp.2 = load int* %x		; <int> [#uses=2]
+ 	store int %tmp.2, int* %tmp.0
+ 	%tmp.3.i = load int* %y		; <int> [#uses=1]
+ 	%tmp.4.i = setlt int %tmp.2, %tmp.3.i		; <bool> [#uses=1]
+ 	%retval.i = select bool %tmp.4.i, int* %y, int* %tmp.0		; <int*> [#uses=1]
+ 	%tmp.6 = load int* %retval.i		; <int> [#uses=1]
+ 	store int %tmp.6, int* %y
+ 	ret void
+ }