1 ; RUN: llc -mtriple=thumbv7-apple-none-macho < %s | FileCheck %s
2 ; RUN: llc -mtriple=thumbv6m-apple-none-macho -disable-fp-elim < %s | FileCheck %s --check-prefix=CHECK-T1
3 ; RUN: llc -mtriple=thumbv7-apple-darwin-ios -disable-fp-elim < %s | FileCheck %s --check-prefix=CHECK-IOS
4 ; RUN: llc -mtriple=thumbv7--linux-gnueabi -disable-fp-elim < %s | FileCheck %s --check-prefix=CHECK-LINUX
9 %bigVec = type [2 x double]
11 @var = global %bigVec zeroinitializer
13 define void @check_simple() minsize {
14 ; CHECK-LABEL: check_simple:
15 ; CHECK: push {r3, r4, r5, r6, r7, lr}
16 ; CHECK-NOT: sub sp, sp,
18 ; CHECK-NOT: add sp, sp,
19 ; CHECK: pop {r0, r1, r2, r3, r7, pc}
21 ; CHECK-T1-LABEL: check_simple:
22 ; CHECK-T1: push {r3, r4, r5, r6, r7, lr}
23 ; CHECK-T1: add r7, sp, #16
24 ; CHECK-T1-NOT: sub sp, sp,
26 ; CHECK-T1-NOT: add sp, sp,
27 ; CHECK-T1: pop {r0, r1, r2, r3, r7, pc}
29 ; iOS always has a frame pointer and messing with the push affects
30 ; how it's set in the prologue. Make sure we get that right.
31 ; CHECK-IOS-LABEL: check_simple:
32 ; CHECK-IOS: push {r3, r4, r5, r6, r7, lr}
34 ; CHECK-IOS: add r7, sp, #16
38 ; CHEC: pop {r3, r4, r5, r6, r7, pc}
40 %var = alloca i8, i32 16
41 call void @bar(i8* %var)
45 define void @check_simple_too_big() minsize {
46 ; CHECK-LABEL: check_simple_too_big:
47 ; CHECK: push {r7, lr}
52 %var = alloca i8, i32 64
53 call void @bar(i8* %var)
57 define void @check_vfp_fold() minsize {
58 ; CHECK-LABEL: check_vfp_fold:
59 ; CHECK: push {r[[GLOBREG:[0-9]+]], lr}
60 ; CHECK: vpush {d6, d7, d8, d9}
64 ; CHECK: vpop {d6, d7, d8, d9}
65 ; CHECK: pop {r[[GLOBREG]], pc}
67 ; iOS uses aligned NEON stores here, which is convenient since we
68 ; want to make sure that works too.
69 ; CHECK-IOS-LABEL: check_vfp_fold:
70 ; CHECK-IOS: push {r4, r7, lr}
71 ; CHECK-IOS: sub.w r4, sp, #16
72 ; CHECK-IOS: bfc r4, #0, #4
73 ; CHECK-IOS: mov sp, r4
74 ; CHECK-IOS: vst1.64 {d8, d9}, [r4:128]
75 ; CHECK-IOS: sub sp, #16
77 ; CHECK-IOS: add r4, sp, #16
78 ; CHECK-IOS: vld1.64 {d8, d9}, [r4:128]
79 ; CHECK-IOS: mov sp, r4
80 ; CHECK-IOS: pop {r4, r7, pc}
82 %var = alloca i8, i32 16
84 call void asm "", "r,~{d8},~{d9}"(i8* %var)
85 call void @bar(i8* %var)
90 ; This function should use just enough space that the "add sp, sp, ..." could be
91 ; folded in except that doing so would clobber the value being returned.
92 define i64 @check_no_return_clobber() minsize {
93 ; CHECK-LABEL: check_no_return_clobber:
94 ; CHECK: push {r1, r2, r3, r4, r5, r6, r7, lr}
100 ; Just to keep iOS FileCheck within previous function:
101 ; CHECK-IOS-LABEL: check_no_return_clobber:
103 %var = alloca i8, i32 20
104 call void @bar(i8* %var)
108 define arm_aapcs_vfpcc double @check_vfp_no_return_clobber() minsize {
109 ; CHECK-LABEL: check_vfp_no_return_clobber:
110 ; CHECK: push {r[[GLOBREG:[0-9]+]], lr}
111 ; CHECK: vpush {d0, d1, d2, d3, d4, d5, d6, d7, d8, d9}
115 ; CHECK: vpop {d8, d9}
116 ; CHECK: pop {r[[GLOBREG]], pc}
118 %var = alloca i8, i32 64
120 %tmp = load %bigVec, %bigVec* @var
121 call void @bar(i8* %var)
122 store %bigVec %tmp, %bigVec* @var
127 @dbl = global double 0.0
129 ; PR18136: there was a bug determining where the first eligible pop in a
130 ; basic-block was when the entire block was epilogue code.
131 define void @test_fold_point(i1 %tst) minsize {
132 ; CHECK-LABEL: test_fold_point:
134 ; Important to check for beginning of basic block, because if it gets
135 ; if-converted the test is probably no longer checking what it should.
136 ; CHECK: {{LBB[0-9]+_2}}:
137 ; CHECK-NEXT: vpop {d7, d8}
138 ; CHECK-NEXT: pop {r4, pc}
140 ; With a guaranteed frame-pointer, we want to make sure that its offset in the
141 ; push block is correct, even if a few registers have been tacked onto a later
143 ; CHECK-IOS-LABEL: test_fold_point:
144 ; CHECK-IOS: push {r4, r7, lr}
145 ; CHECK-IOS-NEXT: add r7, sp, #4
146 ; CHECK-IOS-NEXT: vpush {d7, d8}
148 ; We want some memory so there's a stack adjustment to fold...
149 %var = alloca i8, i32 8
151 ; We want a long-lived floating register so that a callee-saved dN is used and
152 ; there's both a vpop and a pop.
153 %live_val = load double, double* @dbl
154 br i1 %tst, label %true, label %end
156 call void @bar(i8* %var)
157 store double %live_val, double* @dbl
160 ; We want the epilogue to be the only thing in a basic block so that we hit
161 ; the correct edge-case (first inst in block is correct one to adjust).
165 define void @test_varsize(...) minsize {
166 ; CHECK-T1-LABEL: test_varsize:
167 ; CHECK-T1: sub sp, #16
168 ; CHECK-T1: push {r5, r6, r7, lr}
170 ; CHECK-T1: pop {r2, r3, r7}
171 ; CHECK-T1: pop {[[POP_REG:r[0-3]]]}
172 ; CHECK-T1: add sp, #16
173 ; CHECK-T1: bx [[POP_REG]]
175 ; CHECK-LABEL: test_varsize:
177 ; CHECK: push {r5, r6, r7, lr}
179 ; CHECK: pop.w {r2, r3, r7, lr}
183 %var = alloca i8, i32 8
184 call void @llvm.va_start(i8* %var)
185 call void @bar(i8* %var)
189 %"MyClass" = type { i8*, i32, i32, float, float, float, [2 x i8], i32, i32* }
195 declare %"MyClass"* @bar2(%"MyClass"* returned, i16*, i32, float, float, i32, i32, i1 zeroext, i1 zeroext, i32)
197 define fastcc float @check_vfp_no_return_clobber2(i16* %r, i16* %chars, i32 %length, i1 zeroext %flag) minsize {
199 ; CHECK-LINUX-LABEL: check_vfp_no_return_clobber2
200 ; CHECK-LINUX: vpush {d0, d1, d2, d3, d4, d5, d6, d7, d8}
203 ; CHECK-LINUX: add sp
204 ; CHECK-LINUX: vpop {d8}
205 %run = alloca %"MyClass", align 4
206 %call = call %"MyClass"* @bar2(%"MyClass"* %run, i16* %chars, i32 %length, float 0.000000e+00, float 0.000000e+00, i32 1, i32 1, i1 zeroext false, i1 zeroext true, i32 3)
207 %call1 = call float @foo()
208 %cmp = icmp eq %"MyClass"* %run, null
209 br i1 %cmp, label %exit, label %if.then
211 if.then: ; preds = %entry
215 exit: ; preds = %if.then, %entry
219 declare void @llvm.va_start(i8*) nounwind