llvm-6502/test/Transforms/InstCombine/setcc-cast-cast.ll
2008-05-01 23:50:07 +00:00

47 lines
1.6 KiB
LLVM

; This test case was reduced from MultiSource/Applications/hbd. It makes sure
; that folding doesn't happen in case a zext is applied where a sext should have
; been when a setcc is used with two casts.
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \
; RUN: not grep {br i1 false}
; END.
define i32 @bug(i8 %inbuff) {
entry:
%tmp = bitcast i8 %inbuff to i8 ; <i8> [#uses=1]
%tmp.upgrd.1 = sext i8 %tmp to i32 ; <i32> [#uses=3]
%tmp.upgrd.2 = icmp eq i32 %tmp.upgrd.1, 1 ; <i1> [#uses=1]
br i1 %tmp.upgrd.2, label %cond_true, label %cond_next
cond_true: ; preds = %entry
br label %bb
cond_next: ; preds = %entry
%tmp3 = icmp eq i32 %tmp.upgrd.1, -1 ; <i1> [#uses=1]
br i1 %tmp3, label %cond_true4, label %cond_next5
cond_true4: ; preds = %cond_next
br label %bb
cond_next5: ; preds = %cond_next
%tmp7 = icmp sgt i32 %tmp.upgrd.1, 1 ; <i1> [#uses=1]
br i1 %tmp7, label %cond_true8, label %cond_false
cond_true8: ; preds = %cond_next5
br label %cond_next9
cond_false: ; preds = %cond_next5
br label %cond_next9
cond_next9: ; preds = %cond_false, %cond_true8
%iftmp.1.0 = phi i32 [ 42, %cond_true8 ], [ 23, %cond_false ] ; <i32> [#uses=1]
br label %return
bb: ; preds = %cond_true4, %cond_true
br label %return
return: ; preds = %bb, %cond_next9
%retval.0 = phi i32 [ 17, %bb ], [ %iftmp.1.0, %cond_next9 ] ; <i32> [#uses=1]
ret i32 %retval.0
}