ARM: Add support for segmented stacks
Patch by Alex Crichton, ILyoan, Luqman Aden and Svetoslav.
llvm-svn: 205430
diff --git a/llvm/test/CodeGen/Thumb/segmented-stacks-dynamic.ll b/llvm/test/CodeGen/Thumb/segmented-stacks-dynamic.ll
new file mode 100644
index 0000000..067c07b
--- /dev/null
+++ b/llvm/test/CodeGen/Thumb/segmented-stacks-dynamic.ll
@@ -0,0 +1,63 @@
+; RUN: llc < %s -mtriple=thumb-linux-unknown-gnueabi -segmented-stacks -verify-machineinstrs | FileCheck %s -check-prefix=Thumb-linux
+; RUN: llc < %s -mtriple=thumb-linux-androideabi -segmented-stacks -verify-machineinstrs | FileCheck %s -check-prefix=Thumb-android
+; RUN: llc < %s -mtriple=thumb-linux-unknown-gnueabi -segmented-stacks -filetype=obj
+; RUN: llc < %s -mtriple=thumb-linux-androideabi -segmented-stacks -filetype=obj
+
+; Just to prevent the alloca from being optimized away
+declare void @dummy_use(i32*, i32)
+
+define i32 @test_basic(i32 %l) {
+ %mem = alloca i32, i32 %l
+ call void @dummy_use (i32* %mem, i32 %l)
+ %terminate = icmp eq i32 %l, 0
+ br i1 %terminate, label %true, label %false
+
+true:
+ ret i32 0
+
+false:
+ %newlen = sub i32 %l, 1
+ %retvalue = call i32 @test_basic(i32 %newlen)
+ ret i32 %retvalue
+
+; Thumb-linux: test_basic:
+
+; Thumb-linux: push {r4, r5}
+; Thumb-linux: mov r5, sp
+; Thumb-linux-NEXT: ldr r4, .LCPI0_0
+; Thumb-linux-NEXT: ldr r4, [r4]
+; Thumb-linux-NEXT: cmp r4, r5
+; Thumb-linux-NEXT: blo .LBB0_2
+
+; Thumb-linux: mov r4, #16
+; Thumb-linux-NEXT: mov r5, #0
+; Thumb-linux-NEXT: push {lr}
+; Thumb-linux-NEXT: bl __morestack
+; Thumb-linux-NEXT: pop {r4}
+; Thumb-linux-NEXT: mov lr, r4
+; Thumb-linux-NEXT: pop {r4, r5}
+; Thumb-linux-NEXT: bx lr
+
+; Thumb-linux: pop {r4, r5}
+
+; Thumb-android: test_basic:
+
+; Thumb-android: push {r4, r5}
+; Thumb-android: mov r5, sp
+; Thumb-android-NEXT: ldr r4, .LCPI0_0
+; Thumb-android-NEXT: ldr r4, [r4]
+; Thumb-android-NEXT: cmp r4, r5
+; Thumb-android-NEXT: blo .LBB0_2
+
+; Thumb-android: mov r4, #16
+; Thumb-android-NEXT: mov r5, #0
+; Thumb-android-NEXT: push {lr}
+; Thumb-android-NEXT: bl __morestack
+; Thumb-android-NEXT: pop {r4}
+; Thumb-android-NEXT: mov lr, r4
+; Thumb-android-NEXT: pop {r4, r5}
+; Thumb-android-NEXT: bx lr
+
+; Thumb-android: pop {r4, r5}
+
+}