; RUN: llc < %s -mtriple=thumbv6-apple-darwin | FileCheck %s
; RUN: llc < %s -mtriple=thumbv6-apple-darwin -regalloc=basic | FileCheck %s
-; rdar://8819685
+; RUN: llc < %s -o %t -filetype=obj -mtriple=thumbv6-apple-darwin
+; RUN: llvm-objdump -triple=thumbv6-apple-darwin -d %t | FileCheck %s
@__bar = external hidden global i8*
@__baz = external hidden global i8*
+; rdar://8819685
define i8* @_foo() {
entry:
-; CHECK: foo:
+; CHECK-LABEL: foo:
%size = alloca i32, align 4
- %0 = load i8** @__bar, align 4
+ %0 = load i8*, i8** @__bar, align 4
%1 = icmp eq i8* %0, null
br i1 %1, label %bb1, label %bb3
; CHECK: bne
%2 = alloca [1026 x i8], align 1
; CHECK: mov [[R0:r[0-9]+]], sp
; CHECK: adds {{r[0-9]+}}, [[R0]], {{r[0-9]+}}
- %3 = getelementptr inbounds [1026 x i8]* %2, i32 0, i32 0
+ %3 = getelementptr inbounds [1026 x i8], [1026 x i8]* %2, i32 0, i32 0
%4 = call i32 @_called_func(i8* %3, i32* %size) nounwind
%5 = icmp eq i32 %4, 0
br i1 %5, label %bb2, label %bb3
}
declare noalias i8* @strdup(i8* nocapture) nounwind
-declare i32 @_called_func(i8*, i32*) nounwind
\ No newline at end of file
+declare i32 @_called_func(i8*, i32*) nounwind
+
+; Simple variable ending up *at* sp.
+define void @test_simple_var() {
+; CHECK-LABEL: test_simple_var:
+
+ %addr32 = alloca i32
+ %addr8 = bitcast i32* %addr32 to i8*
+
+; CHECK: mov r0, sp
+; CHECK-NOT: adds r0
+; CHECK: blx
+ call void @take_ptr(i8* %addr8)
+ ret void
+}
+
+; Simple variable ending up at aligned offset from sp.
+define void @test_local_var_addr_aligned() {
+; CHECK-LABEL: test_local_var_addr_aligned:
+
+ %addr1.32 = alloca i32
+ %addr1 = bitcast i32* %addr1.32 to i8*
+ %addr2.32 = alloca i32
+ %addr2 = bitcast i32* %addr2.32 to i8*
+
+; CHECK: add r0, sp, #{{[0-9]+}}
+; CHECK: blx
+ call void @take_ptr(i8* %addr1)
+
+; CHECK: mov r0, sp
+; CHECK-NOT: add r0
+; CHECK: blx
+ call void @take_ptr(i8* %addr2)
+
+ ret void
+}
+
+; Simple variable ending up at aligned offset from sp.
+define void @test_local_var_big_offset() {
+; CHECK-LABEL: test_local_var_big_offset:
+ %addr1.32 = alloca i32, i32 257
+ %addr1 = bitcast i32* %addr1.32 to i8*
+ %addr2.32 = alloca i32, i32 257
+
+; CHECK: add [[RTMP:r[0-9]+]], sp, #1020
+; CHECK: adds [[RTMP]], #8
+; CHECK: blx
+ call void @take_ptr(i8* %addr1)
+
+ ret void
+}
+
+; Max range addressable with tADDrSPi
+define void @test_local_var_offset_1020() {
+; CHECK-LABEL: test_local_var_offset_1020
+ %addr1 = alloca i8, i32 4
+ %addr2 = alloca i8, i32 1020
+
+; CHECK: add r0, sp, #1020
+; CHECK-NEXT: blx
+ call void @take_ptr(i8* %addr1)
+
+ ret void
+}
+
+; Max range addressable with tADDrSPi + tADDi8 is 1275, however the automatic
+; 4-byte aligning of objects on the stack combined with 8-byte stack alignment
+; means that 1268 is the max offset we can use.
+define void @test_local_var_offset_1268() {
+; CHECK-LABEL: test_local_var_offset_1268
+ %addr1 = alloca i8, i32 1
+ %addr2 = alloca i8, i32 1268
+
+; CHECK: add r0, sp, #1020
+; CHECK: adds r0, #248
+; CHECK-NEXT: blx
+ call void @take_ptr(i8* %addr1)
+
+ ret void
+}
+
+declare void @take_ptr(i8*)