Segmented stacks: omit __morestack call when there's no frame.
Patch by Florian Zeitz
llvm-svn: 209436
diff --git a/llvm/test/CodeGen/ARM/segmented-stacks.ll b/llvm/test/CodeGen/ARM/segmented-stacks.ll
index a7804b9..9873bf3 100644
--- a/llvm/test/CodeGen/ARM/segmented-stacks.ll
+++ b/llvm/test/CodeGen/ARM/segmented-stacks.ll
@@ -57,6 +57,8 @@
define i32 @test_nested(i32 * nest %closure, i32 %other) #0 {
%addend = load i32 * %closure
%result = add i32 %other, %addend
+ %mem = alloca i32, i32 10
+ call void @dummy_use (i32* %mem, i32 10)
ret i32 %result
; ARM-linux: test_nested:
@@ -68,7 +70,7 @@
; ARM-linux-NEXT: cmp r4, r5
; ARM-linux-NEXT: blo .LBB1_2
-; ARM-linux: mov r4, #0
+; ARM-linux: mov r4, #56
; ARM-linux-NEXT: mov r5, #0
; ARM-linux-NEXT: stmdb sp!, {lr}
; ARM-linux-NEXT: bl __morestack
@@ -87,7 +89,7 @@
; ARM-android-NEXT: cmp r4, r5
; ARM-android-NEXT: blo .LBB1_2
-; ARM-android: mov r4, #0
+; ARM-android: mov r4, #56
; ARM-android-NEXT: mov r5, #0
; ARM-android-NEXT: stmdb sp!, {lr}
; ARM-android-NEXT: bl __morestack
@@ -234,4 +236,14 @@
}
+define void @test_nostack() #0 {
+ ret void
+
+; ARM-linux-LABEL: test_nostack:
+; ARM-linux-NOT: bl __morestack
+
+; ARM-android-LABEL: test_nostack:
+; ARM-android-NOT: bl __morestack
+}
+
attributes #0 = { "split-stack" }
diff --git a/llvm/test/CodeGen/Thumb/segmented-stacks.ll b/llvm/test/CodeGen/Thumb/segmented-stacks.ll
index 89043ec..d6e25c7 100644
--- a/llvm/test/CodeGen/Thumb/segmented-stacks.ll
+++ b/llvm/test/CodeGen/Thumb/segmented-stacks.ll
@@ -57,6 +57,8 @@
define i32 @test_nested(i32 * nest %closure, i32 %other) #0 {
%addend = load i32 * %closure
%result = add i32 %other, %addend
+ %mem = alloca i32, i32 10
+ call void @dummy_use (i32* %mem, i32 10)
ret i32 %result
; Thumb-android: test_nested:
@@ -68,7 +70,7 @@
; Thumb-android-NEXT: cmp r4, r5
; Thumb-android-NEXT: blo .LBB1_2
-; Thumb-android: mov r4, #0
+; Thumb-android: mov r4, #56
; Thumb-android-NEXT: mov r5, #0
; Thumb-android-NEXT: push {lr}
; Thumb-android-NEXT: bl __morestack
@@ -88,7 +90,7 @@
; Thumb-linux-NEXT: cmp r4, r5
; Thumb-linux-NEXT: blo .LBB1_2
-; Thumb-linux: mov r4, #0
+; Thumb-linux: mov r4, #56
; Thumb-linux-NEXT: mov r5, #0
; Thumb-linux-NEXT: push {lr}
; Thumb-linux-NEXT: bl __morestack
@@ -246,4 +248,14 @@
}
+define void @test_nostack() #0 {
+ ret void
+
+; Thumb-android-LABEL: test_nostack:
+; Thumb-android-NOT: bl __morestack
+
+; Thumb-linux-LABEL: test_nostack:
+; Thumb-linux-NOT: bl __morestack
+}
+
attributes #0 = { "split-stack" }
diff --git a/llvm/test/CodeGen/X86/segmented-stacks.ll b/llvm/test/CodeGen/X86/segmented-stacks.ll
index 8089f20..9dab3cd 100644
--- a/llvm/test/CodeGen/X86/segmented-stacks.ll
+++ b/llvm/test/CodeGen/X86/segmented-stacks.ll
@@ -107,13 +107,15 @@
define i32 @test_nested(i32 * nest %closure, i32 %other) #0 {
%addend = load i32 * %closure
%result = add i32 %other, %addend
+ %mem = alloca i32, i32 10
+ call void @dummy_use (i32* %mem, i32 10)
ret i32 %result
; X32-Linux: cmpl %gs:48, %esp
; X32-Linux-NEXT: ja .LBB1_2
; X32-Linux: pushl $4
-; X32-Linux-NEXT: pushl $0
+; X32-Linux-NEXT: pushl $60
; X32-Linux-NEXT: calll __morestack
; X32-Linux-NEXT: ret
@@ -121,7 +123,7 @@
; X64-Linux-NEXT: ja .LBB1_2
; X64-Linux: movq %r10, %rax
-; X64-Linux-NEXT: movabsq $0, %r10
+; X64-Linux-NEXT: movabsq $56, %r10
; X64-Linux-NEXT: movabsq $0, %r11
; X64-Linux-NEXT: callq __morestack
; X64-Linux-NEXT: ret
@@ -132,7 +134,7 @@
; X32-Darwin-NEXT: ja LBB1_2
; X32-Darwin: pushl $4
-; X32-Darwin-NEXT: pushl $0
+; X32-Darwin-NEXT: pushl $60
; X32-Darwin-NEXT: calll ___morestack
; X32-Darwin-NEXT: ret
@@ -140,7 +142,7 @@
; X64-Darwin-NEXT: ja LBB1_2
; X64-Darwin: movq %r10, %rax
-; X64-Darwin-NEXT: movabsq $0, %r10
+; X64-Darwin-NEXT: movabsq $56, %r10
; X64-Darwin-NEXT: movabsq $0, %r11
; X64-Darwin-NEXT: callq ___morestack
; X64-Darwin-NEXT: ret
@@ -150,7 +152,7 @@
; X32-MinGW-NEXT: ja LBB1_2
; X32-MinGW: pushl $4
-; X32-MinGW-NEXT: pushl $0
+; X32-MinGW-NEXT: pushl $52
; X32-MinGW-NEXT: calll ___morestack
; X32-MinGW-NEXT: ret
@@ -159,7 +161,7 @@
; X64-MinGW-NEXT: ja .LBB1_2
; X64-MinGW: movq %r10, %rax
-; X64-MinGW-NEXT: movabsq $0, %r10
+; X64-MinGW-NEXT: movabsq $88, %r10
; X64-MinGW-NEXT: movabsq $32, %r11
; X64-MinGW-NEXT: callq __morestack
; X64-MinGW-NEXT: retq
@@ -169,7 +171,7 @@
; X64-FreeBSD-NEXT: ja .LBB1_2
; X64-FreeBSD: movq %r10, %rax
-; X64-FreeBSD-NEXT: movabsq $0, %r10
+; X64-FreeBSD-NEXT: movabsq $56, %r10
; X64-FreeBSD-NEXT: movabsq $0, %r11
; X64-FreeBSD-NEXT: callq __morestack
; X64-FreeBSD-NEXT: ret
@@ -435,4 +437,29 @@
}
+define void @test_nostack() #0 {
+ ret void
+
+; X32-Linux-LABEL: test_nostack:
+; X32-Linux-NOT: calll __morestack
+
+; X64-Linux-LABEL: test_nostack:
+; X32-Linux-NOT: callq __morestack
+
+; X32-Darwin-LABEL: test_nostack:
+; X32-Darwin-NOT: calll __morestack
+
+; X64-Darwin-LABEL: test_nostack:
+; X64-Darwin-NOT: callq __morestack
+
+; X32-MinGW-LABEL: test_nostack:
+; X32-MinGW-NOT: calll __morestack
+
+; X64-MinGW-LABEL: test_nostack:
+; X64-MinGW-NOT: callq __morestack
+
+; X64-FreeBSD-LABEL: test_nostack:
+; X64-FreeBSD-NOT: callq __morestack
+}
+
attributes #0 = { "split-stack" }