Fix a logic bug in x86 vector codegen: sext (zext (x) ) != sext (x) (PR20472).

[oota-llvm.git] / test / CodeGen / X86 / lsr-overflow.ll

diff --git a/test/CodeGen/X86/lsr-overflow.ll b/test/CodeGen/X86/lsr-overflow.ll
index eb6fa905b5a10756f564899c02bd03d1c2763e14..09c1c07ef3de01d0bbf9c01267608e2e38b81f3a 100644 (file)
--- a/test/CodeGen/X86/lsr-overflow.ll
+++ b/test/CodeGen/X86/lsr-overflow.ll
@@ -1,10 +1,11 @@
-; RUN: llc < %s -march=x86-64 | FileCheck %s
+; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s
+; RUN: llc < %s -mtriple=x86_64-win32 | FileCheck %s
 
 ; The comparison uses the pre-inc value, which could lead LSR to
 ; try to compute -INT64_MIN.
 
-; CHECK: movabsq $-9223372036854775808, %rax ## imm = 0x8000000000000000
-; CHECK: cmpq  %rax, %rbx
+; CHECK: movabsq $-9223372036854775808, %rax
+; CHECK: cmpq  %rax,
 ; CHECK: sete  %al
 
 declare i64 @bar()
@@ -24,3 +25,21 @@ __ABContainsLabel.exit:
   %cmp = icmp eq i64 %indvar, 9223372036854775807
   ret i1 %cmp
 }
+
+define void @func_37() noreturn nounwind readonly {
+entry:
+  br label %for.body
+
+for.body:                                         ; preds = %for.inc8, %entry
+  %indvar = phi i64 [ 0, %entry ], [ %indvar.next, %for.inc8 ]
+  %sub.i = add i64 undef, %indvar
+  %cmp.i = icmp eq i64 %sub.i, -9223372036854775808
+  br i1 undef, label %for.inc8, label %for.cond4
+
+for.cond4:                                        ; preds = %for.cond4, %for.body
+  br label %for.cond4
+
+for.inc8:                                         ; preds = %for.body
+  %indvar.next = add i64 %indvar, 1
+  br label %for.body
+}