Dynamic stack realignment use of sp register as source/dest register
in "bic sp, sp, #15" leads to unpredicatble behaviour in Thumb2 mode.
Emit the following code instead:
mov r4, sp
bic r4, r4, #15
mov sp, r4
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90724 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/Thumb2/large-stack.ll b/test/CodeGen/Thumb2/large-stack.ll
index 6f59961..da44cde 100644
--- a/test/CodeGen/Thumb2/large-stack.ll
+++ b/test/CodeGen/Thumb2/large-stack.ll
@@ -18,7 +18,7 @@
define i32 @test3() {
; CHECK: test3:
; CHECK: sub.w sp, sp, #805306368
-; CHECK: sub sp, #24
+; CHECK: sub sp, #20
%retval = alloca i32, align 4
%tmp = alloca i32, align 4
%a = alloca [805306369 x i8], align 16