CodeGen peephole: fold redundant phys reg copies

[oota-llvm.git] / test / CodeGen / X86 / add-of-carry.ll

diff --git a/test/CodeGen/X86/add-of-carry.ll b/test/CodeGen/X86/add-of-carry.ll
index f924ec8132ee40dc4bc08750251a65b0587c003e..44b587af3aaad1e3a5aa3da24d467d21c9558980 100644 (file)
--- a/test/CodeGen/X86/add-of-carry.ll
+++ b/test/CodeGen/X86/add-of-carry.ll
@@ -3,10 +3,11 @@
 
 define i32 @test1(i32 %sum, i32 %x) nounwind readnone ssp {
 entry:
-; CHECK: test1:
-; CHECK:       sbbl    %ecx, %ecx
-; CHECK-NOT: addl
-; CHECK: subl  %ecx, %eax
+; CHECK-LABEL: test1:
+; CHECK: movl
+; CHECK-NEXT: addl
+; CHECK-NEXT: adcl $0
+; CHECK-NEXT: ret
   %add4 = add i32 %x, %sum
   %cmp = icmp ult i32 %add4, %x
   %inc = zext i1 %cmp to i32
@@ -14,21 +15,15 @@ entry:
   ret i32 %z.0
 }
 
-; Instcombine transforms test1 into test2:
-; CHECK: test2:
-; CHECK: movl
-; CHECK-NEXT: addl
-; CHECK-NEXT: sbbl
-; CHECK-NEXT: subl
-; CHECK-NEXT: ret
-define i32 @test2(i32 %sum, i32 %x) nounwind readnone ssp {
+; <rdar://problem/12579915>
+define i32 @test2(i32 %x, i32 %y, i32 %res) nounwind uwtable readnone ssp {
 entry:
-  %uadd = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %x, i32 %sum)
-  %0 = extractvalue { i32, i1 } %uadd, 0
-  %cmp = extractvalue { i32, i1 } %uadd, 1
-  %inc = zext i1 %cmp to i32
-  %z.0 = add i32 %0, %inc
-  ret i32 %z.0
+  %cmp = icmp ugt i32 %x, %y
+  %dec = sext i1 %cmp to i32
+  %dec.res = add nsw i32 %dec, %res
+  ret i32 %dec.res
+; CHECK-LABEL: test2:
+; CHECK: cmpl
+; CHECK: sbbl
+; CHECK: ret
 }
-
-declare { i32, i1 } @llvm.uadd.with.overflow.i32(i32, i32) nounwind readnone