vendor/llvm/llvm-r108243

1 files changed, 39 insertions, 0 deletions

diff --git a/test/CodeGen/X86/2010-06-25-CoalescerSubRegDefDead.ll b/test/CodeGen/X86/2010-06-25-CoalescerSubRegDefDead.ll
new file mode 100644
index 0000000000000..c6421a247eaad
--- /dev/null
+++ b/test/CodeGen/X86/2010-06-25-CoalescerSubRegDefDead.ll
@@ -0,0 +1,39 @@
+; RUN: llc -O1 -mtriple=x86_64-apple-darwin10 -relocation-model=pic -disable-fp-elim < %s | FileCheck %s
+; <rdar://problem/8124405>
+
+%struct.type = type { %struct.subtype*, i32, i8, i32, i8, i32, i32, i32, i32, i32, i8, i32, i32, i32, i32, i32, [256 x i32], i32, [257 x i32], [257 x i32], i32*, i16*, i8*, i32, i32, i32, i32, i32, [256 x i8], [16 x i8], [256 x i8], [4096 x i8], [16 x i32], [18002 x i8], [18002 x i8], [6 x [258 x i8]], [6 x [258 x i32]], [6 x [258 x i32]], [6 x [258 x i32]], [6 x i32], i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32*, i32*, i32* }
+%struct.subtype = type { i8*, i32, i32, i32, i8*, i32, i32, i32, i8*, i8* (i8*, i32, i32)*, void (i8*, i8*)*, i8* }
+
+define i32 @func(%struct.type* %s) nounwind optsize ssp {
+entry:
+  %tmp1 = getelementptr inbounds %struct.type* %s, i32 0, i32 1
+  %tmp2 = load i32* %tmp1, align 8
+  %tmp3 = icmp eq i32 %tmp2, 10
+  %tmp4 = getelementptr inbounds %struct.type* %s, i32 0, i32 40
+  br i1 %tmp3, label %bb, label %entry.bb1_crit_edge
+
+entry.bb1_crit_edge:
+  br label %bb1
+
+bb:
+
+; The point of this code is that %rdi is set to %rdi+64036 for the rep;stosl
+; statement. It can be an ADD or LEA instruction, it's not important which one
+; it is.
+;
+;      CHECK: ## %bb
+; CHECK-NEXT: addq $64036, %rdi
+;      CHECK: rep;stosl
+
+  %tmp5 = bitcast i32* %tmp4 to i8*
+  call void @llvm.memset.p0i8.i64(i8* %tmp5, i8 0, i64 84, i32 4, i1 false)
+  %tmp6 = getelementptr inbounds %struct.type* %s, i32 0, i32 62
+  store i32* null, i32** %tmp6, align 8
+  br label %bb1
+
+bb1:
+  store i32 10, i32* %tmp1, align 8
+  ret i32 42
+}
+
+declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind