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.ll b/llvm/test/CodeGen/Thumb/segmented-stacks.ll
new file mode 100644
index 0000000..5649b00
--- /dev/null
+++ b/llvm/test/CodeGen/Thumb/segmented-stacks.ll
@@ -0,0 +1,247 @@
+; 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 -verify-machineinstrs | FileCheck %s -check-prefix=Thumb-linux
+; RUN: llc < %s -mtriple=thumb-linux-androideabi -segmented-stacks -filetype=obj
+; RUN: llc < %s -mtriple=thumb-linux-unknown-gnueabi -segmented-stacks -filetype=obj
+
+
+; Just to prevent the alloca from being optimized away
+declare void @dummy_use(i32*, i32)
+
+define void @test_basic() {
+ %mem = alloca i32, i32 10
+ call void @dummy_use (i32* %mem, i32 10)
+ ret void
+
+; Thumb-android: test_basic:
+
+; Thumb-android: push {r4, r5}
+; Thumb-android-NEXT: 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, #48
+; 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}
+
+; Thumb-linux: test_basic:
+
+; Thumb-linux: push {r4, r5}
+; Thumb-linux-NEXT: 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, #48
+; 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}
+
+}
+
+define i32 @test_nested(i32 * nest %closure, i32 %other) {
+ %addend = load i32 * %closure
+ %result = add i32 %other, %addend
+ ret i32 %result
+
+; Thumb-android: test_nested:
+
+; Thumb-android: push {r4, r5}
+; Thumb-android-NEXT: mov r5, sp
+; Thumb-android-NEXT: ldr r4, .LCPI1_0
+; Thumb-android-NEXT: ldr r4, [r4]
+; Thumb-android-NEXT: cmp r4, r5
+; Thumb-android-NEXT: blo .LBB1_2
+
+; Thumb-android: mov r4, #0
+; 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}
+
+; Thumb-linux: test_nested:
+
+; Thumb-linux: push {r4, r5}
+; Thumb-linux-NEXT: mov r5, sp
+; Thumb-linux-NEXT: ldr r4, .LCPI1_0
+; Thumb-linux-NEXT: ldr r4, [r4]
+; Thumb-linux-NEXT: cmp r4, r5
+; Thumb-linux-NEXT: blo .LBB1_2
+
+; Thumb-linux: mov r4, #0
+; 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}
+
+}
+
+define void @test_large() {
+ %mem = alloca i32, i32 10000
+ call void @dummy_use (i32* %mem, i32 0)
+ ret void
+
+; Thumb-android: test_large:
+
+; Thumb-android: push {r4, r5}
+; Thumb-android-NEXT: mov r5, sp
+; Thumb-android-NEXT: sub r5, #40192
+; Thumb-android-NEXT: ldr r4, .LCPI2_2
+; Thumb-android-NEXT: ldr r4, [r4]
+; Thumb-android-NEXT: cmp r4, r5
+; Thumb-android-NEXT: blo .LBB2_2
+
+; Thumb-android: mov r4, #40192
+; 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}
+
+; Thumb-linux: test_large:
+
+; Thumb-linux: push {r4, r5}
+; Thumb-linux-NEXT: mov r5, sp
+; Thumb-linux-NEXT: sub r5, #40192
+; Thumb-linux-NEXT: ldr r4, .LCPI2_2
+; Thumb-linux-NEXT: ldr r4, [r4]
+; Thumb-linux-NEXT: cmp r4, r5
+; Thumb-linux-NEXT: blo .LBB2_2
+
+; Thumb-linux: mov r4, #40192
+; 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}
+
+}
+
+define fastcc void @test_fastcc() {
+ %mem = alloca i32, i32 10
+ call void @dummy_use (i32* %mem, i32 10)
+ ret void
+
+; Thumb-android: test_fastcc:
+
+; Thumb-android: push {r4, r5}
+; Thumb-android-NEXT: mov r5, sp
+; Thumb-android-NEXT: ldr r4, .LCPI3_0
+; Thumb-android-NEXT: ldr r4, [r4]
+; Thumb-android-NEXT: cmp r4, r5
+; Thumb-android-NEXT: blo .LBB3_2
+
+; Thumb-android: mov r4, #48
+; 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}
+
+; Thumb-linux: test_fastcc:
+
+; Thumb-linux: push {r4, r5}
+; Thumb-linux-NEXT: mov r5, sp
+; Thumb-linux-NEXT: ldr r4, .LCPI3_0
+; Thumb-linux-NEXT: ldr r4, [r4]
+; Thumb-linux-NEXT: cmp r4, r5
+; Thumb-linux-NEXT: blo .LBB3_2
+
+; Thumb-linux: mov r4, #48
+; 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}
+
+}
+
+define fastcc void @test_fastcc_large() {
+ %mem = alloca i32, i32 10000
+ call void @dummy_use (i32* %mem, i32 0)
+ ret void
+
+; Thumb-android: test_fastcc_large:
+
+; Thumb-android: push {r4, r5}
+; Thumb-android-NEXT: mov r5, sp
+; Thumb-android-NEXT: sub r5, #40192
+; Thumb-android-NEXT: ldr r4, .LCPI4_2
+; Thumb-android-NEXT: ldr r4, [r4]
+; Thumb-android-NEXT: cmp r4, r5
+; Thumb-android-NEXT: blo .LBB4_2
+
+; Thumb-android: mov r4, #40192
+; 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}
+
+; Thumb-linux: test_fastcc_large:
+
+; Thumb-linux: push {r4, r5}
+; Thumb-linux-NEXT: mov r5, sp
+; Thumb-linux-NEXT: sub r5, #40192
+; Thumb-linux-NEXT: ldr r4, .LCPI4_2
+; Thumb-linux-NEXT: ldr r4, [r4]
+; Thumb-linux-NEXT: cmp r4, r5
+; Thumb-linux-NEXT: blo .LBB4_2
+
+; Thumb-linux: mov r4, #40192
+; 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}
+
+}