[RegisterCoalescer] Remove copies to reserved registers

[oota-llvm.git] / test / CodeGen / ARM / dyn-stackalloc.ll

diff --git a/test/CodeGen/ARM/dyn-stackalloc.ll b/test/CodeGen/ARM/dyn-stackalloc.ll
index 4ac5b8a31e5f6ac5bc760bc189feff0c4b2e5df3..5be826519bbc933908e758c5a1a6bd0729753e69 100644 (file)
--- a/test/CodeGen/ARM/dyn-stackalloc.ll
+++ b/test/CodeGen/ARM/dyn-stackalloc.ll
@@ -1,4 +1,4 @@
-; RUN: llc -mtriple=arm-eabi %s -o /dev/null
+; RUN: llc -mcpu=generic -mtriple=arm-eabi < %s | FileCheck %s
 
 %struct.comment = type { i8**, i32*, i32, i8* }
 %struct.info = type { i32, i32, i32, i32, i32, i32, i32, i8* }
@@ -7,6 +7,18 @@
 @str215 = external global [2 x i8]
 
 define void @t1(%struct.state* %v) {
+
+; Make sure we generate:
+;   sub        sp, sp, r1
+; instead of:
+;   sub        r1, sp, r1
+;   mov        sp, r1
+
+; CHECK-LABEL: @t1
+; CHECK: bic [[REG1:r[0-9]+]],
+; CHECK-NOT: sub r{{[0-9]+}}, sp, [[REG1]]
+; CHECK: sub sp, sp, [[REG1]]
+
   %tmp6 = load i32* null
   %tmp8 = alloca float, i32 %tmp6
   store i32 1, i32* null