Regression test for bug in reg. allocation that was using %xcc instead

of %icc even for 32-bit and smaller comparisons.

llvm-svn: 7110

llvm/test/Regression/LLC/2003-07-06-BadIntCmp.ll

@@ -0,0 +1,77 @@
+;; Date: May 28, 2003.
+;; From: test/Programs/MultiSource/Olden-perimeter/maketree.c
+;; Function: int CheckOutside(int x, int y)
+;; 
+;; Note: The .ll code below for this regression test has identical
+;;	 behavior to the above function up to the error, but then prints
+;; 	 true/false on the two branches.
+;; 
+;; Error: llc generates a branch-on-xcc instead of branch-on-icc, which
+;;        is wrong because the value being compared (int euclid = x*x + y*y)
+;;	  overflows, so that the 64-bit and 32-bit compares are not equal.
+;; 
+;; LLC Output:
+;; 
+;; !****** Outputing Function: CheckOutside_34 ******
+;;         .align  4
+;;         .global CheckOutside_34
+;;         .type   CheckOutside_34, 2
+;; CheckOutside_34:
+;; .L_CheckOutside_34_LL_0:
+;;         save    %o6, -192, %o6
+;;         mulx    %i1, %i1, %i1
+;;         mulx    %i0, %i0, %i0
+;;         sethi   %lm(4194304), %o1
+;;         or      %g0, 1, %o0
+;;         add     %i0, %i1, %i0
+;;         sra     %o1, 0, %o1
+;;         subcc   %i0, %o1, %g0
+;;         bg      %xcc, .L_CheckOutside_34_LL_3
+;;         nop     
+;;         ba      .L_CheckOutside_34_LL_1
+;;         nop     
+;; ...
+;; 
+;;
+
+
+target endian = little
+target pointersize = 32
+%.str_1 = internal constant [6 x sbyte] c"true\0A\00"		; <[6 x sbyte]*> [#uses=1]
+%.str_2 = internal constant [7 x sbyte] c"false\0A\00"		; <[7 x sbyte]*> [#uses=1]
+
+implementation   ; Functions:
+
+declare int %printf(sbyte*, ...)
+
+internal void %__main() {
+entry:		; No predecessors!
+	ret void
+}
+
+internal void %CheckOutside(int %x.1, int %y.1) {
+entry:		; No predecessors!
+	%tmp.2 = mul int %x.1, %x.1		; <int> [#uses=1]
+	%tmp.5 = mul int %y.1, %y.1		; <int> [#uses=1]
+	%tmp.6 = add int %tmp.2, %tmp.5		; <int> [#uses=1]
+	%tmp.8 = setle int %tmp.6, 4194304		; <bool> [#uses=1]
+	br bool %tmp.8, label %then, label %else
+
+then:		; preds = %entry
+	%tmp.11 = call int (sbyte*, ...)* %printf( sbyte* getelementptr ([6 x sbyte]* %.str_1, long 0, long 0) )		; <int> [#uses=0]
+	br label %UnifiedExitNode
+
+else:		; preds = %entry
+	%tmp.13 = call int (sbyte*, ...)* %printf( sbyte* getelementptr ([7 x sbyte]* %.str_2, long 0, long 0) )		; <int> [#uses=0]
+	br label %UnifiedExitNode
+
+UnifiedExitNode:		; preds = %then, %else
+	ret void
+}
+
+int %main() {
+entry:		; No predecessors!
+	call void %__main( )
+	call void %CheckOutside( int 2097152, int 2097152 )
+	ret int 0
+}