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authorVikram S. Adve <vadve@cs.uiuc.edu>2003-07-06 20:12:18 +0000
committerVikram S. Adve <vadve@cs.uiuc.edu>2003-07-06 20:12:18 +0000
commit6e5031e0b80db455b7139a6a40fe0a35d10492b4 (patch)
tree6fea61ac0a8c9c3304aa38801248d1c7dfb5cf50 /test/CodeGen
parent46d3f8e34c946c31cd2a8f046268c46294e54a94 (diff)
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Regression test for bug in reg. allocation that was using %xcc instead
of %icc even for 32-bit and smaller comparisons. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7110 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen')
-rw-r--r--test/CodeGen/Generic/2003-07-06-BadIntCmp.ll77
1 files changed, 77 insertions, 0 deletions
diff --git a/test/CodeGen/Generic/2003-07-06-BadIntCmp.ll b/test/CodeGen/Generic/2003-07-06-BadIntCmp.ll
new file mode 100644
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+++ b/test/CodeGen/Generic/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
+}