| ; Disable shrink-wrapping on the first test otherwise we wouldn't |
| ; exerce the path for PR18136. |
| ; RUN: llc -mtriple=thumbv7-apple-none-macho < %s -enable-shrink-wrap=false | FileCheck %s |
| ; RUN: llc -mtriple=thumbv6m-apple-none-macho -disable-fp-elim < %s | FileCheck %s --check-prefix=CHECK-T1 |
| ; RUN: llc -mtriple=thumbv7-apple-darwin-ios -disable-fp-elim < %s | FileCheck %s --check-prefix=CHECK-IOS |
| ; RUN: llc -mtriple=thumbv7--linux-gnueabi -disable-fp-elim < %s | FileCheck %s --check-prefix=CHECK-LINUX |
| |
| |
| declare void @bar(i8*) |
| |
| %bigVec = type [2 x double] |
| |
| @var = global %bigVec zeroinitializer |
| |
| define void @check_simple() minsize { |
| ; CHECK-LABEL: check_simple: |
| ; CHECK: push {r3, r4, r5, r6, r7, lr} |
| ; CHECK-NOT: sub sp, sp, |
| ; ... |
| ; CHECK-NOT: add sp, sp, |
| ; CHECK: pop {r0, r1, r2, r3, r7, pc} |
| |
| ; CHECK-T1-LABEL: check_simple: |
| ; CHECK-T1: push {r3, r4, r5, r6, r7, lr} |
| ; CHECK-T1: add r7, sp, #16 |
| ; CHECK-T1-NOT: sub sp, sp, |
| ; ... |
| ; CHECK-T1-NOT: add sp, sp, |
| ; CHECK-T1: pop {r0, r1, r2, r3, r7, pc} |
| |
| ; iOS always has a frame pointer and messing with the push affects |
| ; how it's set in the prologue. Make sure we get that right. |
| ; CHECK-IOS-LABEL: check_simple: |
| ; CHECK-IOS: push {r3, r4, r5, r6, r7, lr} |
| ; CHECK-NOT: sub sp, |
| ; CHECK-IOS: add r7, sp, #16 |
| ; CHECK-NOT: sub sp, |
| ; ... |
| ; CHECK-NOT: add sp, |
| ; CHEC: pop {r3, r4, r5, r6, r7, pc} |
| |
| %var = alloca i8, i32 16 |
| call void @bar(i8* %var) |
| ret void |
| } |
| |
| define void @check_simple_too_big() minsize { |
| ; CHECK-LABEL: check_simple_too_big: |
| ; CHECK: push {r7, lr} |
| ; CHECK: sub sp, |
| ; ... |
| ; CHECK: add sp, |
| ; CHECK: pop {r7, pc} |
| %var = alloca i8, i32 64 |
| call void @bar(i8* %var) |
| ret void |
| } |
| |
| define void @check_vfp_fold() minsize { |
| ; CHECK-LABEL: check_vfp_fold: |
| ; CHECK: push {r[[GLOBREG:[0-9]+]], lr} |
| ; CHECK: vpush {d6, d7, d8, d9} |
| ; CHECK-NOT: sub sp, |
| ; ... |
| ; CHECK-NOT: add sp, |
| ; CHECK: vpop {d6, d7, d8, d9} |
| ; CHECK: pop {r[[GLOBREG]], pc} |
| |
| ; iOS uses aligned NEON stores here, which is convenient since we |
| ; want to make sure that works too. |
| ; CHECK-IOS-LABEL: check_vfp_fold: |
| ; CHECK-IOS: push {r4, r7, lr} |
| ; CHECK-IOS: sub.w r4, sp, #16 |
| ; CHECK-IOS: bfc r4, #0, #4 |
| ; CHECK-IOS: mov sp, r4 |
| ; CHECK-IOS: vst1.64 {d8, d9}, [r4:128] |
| ; CHECK-IOS: sub sp, #16 |
| ; ... |
| ; CHECK-IOS: add r4, sp, #16 |
| ; CHECK-IOS: vld1.64 {d8, d9}, [r4:128] |
| ; CHECK-IOS: mov sp, r4 |
| ; CHECK-IOS: pop {r4, r7, pc} |
| |
| %var = alloca i8, i32 16 |
| |
| call void asm "", "r,~{d8},~{d9}"(i8* %var) |
| call void @bar(i8* %var) |
| |
| ret void |
| } |
| |
| ; This function should use just enough space that the "add sp, sp, ..." could be |
| ; folded in except that doing so would clobber the value being returned. |
| define i64 @check_no_return_clobber() minsize { |
| ; CHECK-LABEL: check_no_return_clobber: |
| ; CHECK: push {r1, r2, r3, r4, r5, r6, r7, lr} |
| ; CHECK-NOT: sub sp, |
| ; ... |
| ; CHECK: add sp, #24 |
| ; CHECK: pop {r7, pc} |
| |
| ; Just to keep iOS FileCheck within previous function: |
| ; CHECK-IOS-LABEL: check_no_return_clobber: |
| |
| %var = alloca i8, i32 20 |
| call void @bar(i8* %var) |
| ret i64 0 |
| } |
| |
| define arm_aapcs_vfpcc double @check_vfp_no_return_clobber() minsize { |
| ; CHECK-LABEL: check_vfp_no_return_clobber: |
| ; CHECK: push {r[[GLOBREG:[0-9]+]], lr} |
| ; CHECK: vpush {d0, d1, d2, d3, d4, d5, d6, d7, d8, d9} |
| ; CHECK-NOT: sub sp, |
| ; ... |
| ; CHECK: add sp, #64 |
| ; CHECK: vpop {d8, d9} |
| ; CHECK: pop {r[[GLOBREG]], pc} |
| |
| %var = alloca i8, i32 64 |
| |
| %tmp = load %bigVec, %bigVec* @var |
| call void @bar(i8* %var) |
| store %bigVec %tmp, %bigVec* @var |
| |
| ret double 1.0 |
| } |
| |
| @dbl = global double 0.0 |
| |
| ; PR18136: there was a bug determining where the first eligible pop in a |
| ; basic-block was when the entire block was epilogue code. |
| define void @test_fold_point(i1 %tst) minsize { |
| ; CHECK-LABEL: test_fold_point: |
| |
| ; Important to check for beginning of basic block, because if it gets |
| ; if-converted the test is probably no longer checking what it should. |
| ; CHECK: %end |
| ; CHECK-NEXT: vpop {d7, d8} |
| ; CHECK-NEXT: pop {r4, pc} |
| |
| ; With a guaranteed frame-pointer, we want to make sure that its offset in the |
| ; push block is correct, even if a few registers have been tacked onto a later |
| ; vpush (PR18160). |
| ; CHECK-IOS-LABEL: test_fold_point: |
| ; CHECK-IOS: push {r4, r7, lr} |
| ; CHECK-IOS-NEXT: add r7, sp, #4 |
| ; CHECK-IOS-NEXT: vpush {d7, d8} |
| |
| ; We want some memory so there's a stack adjustment to fold... |
| %var = alloca i8, i32 8 |
| |
| ; We want a long-lived floating register so that a callee-saved dN is used and |
| ; there's both a vpop and a pop. |
| %live_val = load double, double* @dbl |
| br i1 %tst, label %true, label %end |
| true: |
| call void @bar(i8* %var) |
| store double %live_val, double* @dbl |
| br label %end |
| end: |
| ; We want the epilogue to be the only thing in a basic block so that we hit |
| ; the correct edge-case (first inst in block is correct one to adjust). |
| ret void |
| } |
| |
| define void @test_varsize(...) minsize { |
| ; CHECK-T1-LABEL: test_varsize: |
| ; CHECK-T1: sub sp, #16 |
| ; CHECK-T1: push {r5, r6, r7, lr} |
| ; ... |
| ; CHECK-T1: pop {r2, r3, r7} |
| ; CHECK-T1: pop {[[POP_REG:r[0-3]]]} |
| ; CHECK-T1: add sp, #16 |
| ; CHECK-T1: bx [[POP_REG]] |
| |
| ; CHECK-LABEL: test_varsize: |
| ; CHECK: sub sp, #16 |
| ; CHECK: push {r5, r6, r7, lr} |
| ; ... |
| ; CHECK: pop.w {r2, r3, r7, lr} |
| ; CHECK: add sp, #16 |
| ; CHECK: bx lr |
| |
| %var = alloca i8, i32 8 |
| call void @llvm.va_start(i8* %var) |
| call void @bar(i8* %var) |
| ret void |
| } |
| |
| %"MyClass" = type { i8*, i32, i32, float, float, float, [2 x i8], i32, i32* } |
| |
| declare float @foo() |
| |
| declare void @bar3() |
| |
| declare %"MyClass"* @bar2(%"MyClass"* returned, i16*, i32, float, float, i32, i32, i1 zeroext, i1 zeroext, i32) |
| |
| define fastcc float @check_vfp_no_return_clobber2(i16* %r, i16* %chars, i32 %length, i1 zeroext %flag) minsize { |
| entry: |
| ; CHECK-LINUX-LABEL: check_vfp_no_return_clobber2 |
| ; CHECK-LINUX: vpush {d0, d1, d2, d3, d4, d5, d6, d7, d8} |
| ; CHECK-NOT: sub sp, |
| ; ... |
| ; CHECK-LINUX: add sp |
| ; CHECK-LINUX: vpop {d8} |
| %run = alloca %"MyClass", align 4 |
| %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) |
| %call1 = call float @foo() |
| %cmp = icmp eq %"MyClass"* %run, null |
| br i1 %cmp, label %exit, label %if.then |
| |
| if.then: ; preds = %entry |
| call void @bar3() |
| br label %exit |
| |
| exit: ; preds = %if.then, %entry |
| ret float %call1 |
| } |
| |
| declare void @use_arr(i32*) |
| define void @test_fold_reuse() minsize { |
| ; CHECK-LABEL: test_fold_reuse: |
| ; CHECK: push.w {r4, r7, r8, lr} |
| ; CHECK: sub sp, #24 |
| ; [...] |
| ; CHECK: add sp, #24 |
| ; CHECK: pop.w {r4, r7, r8, pc} |
| %arr = alloca i8, i32 24 |
| call void asm sideeffect "", "~{r8},~{r4}"() |
| call void @bar(i8* %arr) |
| ret void |
| } |
| |
| declare void @llvm.va_start(i8*) nounwind |
