Sink dag combine's post index load / store code that swap base ptr and index into...

[oota-llvm.git] / test / CodeGen / ARM / 2010-05-18-PostIndexBug.ll

diff --git a/test/CodeGen/ARM/2010-05-18-PostIndexBug.ll b/test/CodeGen/ARM/2010-05-18-PostIndexBug.ll
new file mode 100644 (file)
index 0000000..9907228
--- /dev/null
+++ b/test/CodeGen/ARM/2010-05-18-PostIndexBug.ll
@@ -0,0 +1,25 @@
+; RUN: llc < %s -mtriple=armv7-apple-darwin   | FileCheck %s -check-prefix=ARM
+; RUN: llc < %s -mtriple=thumbv7-apple-darwin | FileCheck %s -check-prefix=THUMB
+; rdar://7998649
+
+%struct.foo = type { i64, i64 }
+
+define arm_apcscc zeroext i8 @t(%struct.foo* %this) noreturn optsize {
+entry:
+; ARM:       t:
+; ARM:       str r0, [r1], r0
+
+; THUMB:     t:
+; THUMB-NOT: str r0, [r1], r0
+; THUMB:     str r0, [r1]
+  %0 = getelementptr inbounds %struct.foo* %this, i32 0, i32 1 ; <i64*> [#uses=1]
+  store i32 undef, i32* inttoptr (i32 8 to i32*), align 8
+  br i1 undef, label %bb.nph96, label %bb3
+
+bb3:                                              ; preds = %entry
+  %1 = load i64* %0, align 4                      ; <i64> [#uses=0]
+  unreachable
+
+bb.nph96:                                         ; preds = %entry
+  unreachable
+}