diff options
Diffstat (limited to 'llvm/test/CodeGen/ARM')
4 files changed, 222 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/ARM/reg-alloc-fixed-r6-vla.ll b/llvm/test/CodeGen/ARM/reg-alloc-fixed-r6-vla.ll new file mode 100644 index 00000000000..0b6fd7443af --- /dev/null +++ b/llvm/test/CodeGen/ARM/reg-alloc-fixed-r6-vla.ll @@ -0,0 +1,44 @@ +; Using VLAs(Variable Length Arrays) in a function will use R6 to keep track +; of the stack frame, and also spill/restore R6 to the stack. +; This tests that using -ffixed-r6 (-mattr=+reserve-r6) will stop R6 +; being used and also stop it being spilled/restored to the stack. +; RUN: llc < %s -mcpu=cortex-m0 -mtriple=thumbv7-arm-none-eabi | FileCheck %s --check-prefix=CHECK-STATIC --check-prefix=CHECK-R6 +; RUN: llc < %s -mcpu=cortex-m0 -mtriple=thumbv7-arm-none-eabi -mattr=+reserve-r6 | FileCheck %s --check-prefix=CHECK-STATIC --check-prefix=CHECK-NO-R6 + +define void @f() #0 { +entry: + %i = alloca i32, align 4 + store i32 0, i32* %i, align 4 + + %saved_stack = alloca i8*, align 4 + %0 = call i8* @llvm.stacksave() + store i8* %0, i8** %saved_stack, align 4 + + %__vla_expr0 = alloca i32, align 4 + %1 = load i32, i32* %i, align 4 + %vla = alloca double, i32 %1, align 8 + store i32 %1, i32* %__vla_expr0, align 4 + + %2 = load i8*, i8** %saved_stack, align 4 + call void @llvm.stackrestore(i8* %2) + + ret void +} + +declare i8* @llvm.stacksave() #1 +declare void @llvm.stackrestore(i8* %ptr) #1 + +attributes #0 = { noinline nounwind "stackrealign" } +attributes #1 = { nounwind } + +; CHECK-STATIC: push {r4, +; CHECK-R6: r6 +; CHECK-NO-R6-NOT: r6 +; CHECK-STATIC: lr} +; CHECK-R6: r6 +; CHECK-NO-R6-NOT: r6 +; CHECK-STATIC: pop {r4, +; CHECK-R6: r6 +; CHECK-NO-R6-NOT: r6 +; CHECK-STATIC: pc} + diff --git a/llvm/test/CodeGen/ARM/reg-alloc-with-fixed-reg-r6-modified.ll b/llvm/test/CodeGen/ARM/reg-alloc-with-fixed-reg-r6-modified.ll new file mode 100644 index 00000000000..e2a4af87dde --- /dev/null +++ b/llvm/test/CodeGen/ARM/reg-alloc-with-fixed-reg-r6-modified.ll @@ -0,0 +1,63 @@ +; RUN: llc < %s -mattr=+reserve-r6 -mtriple=arm-linux-gnueabi -O0 -filetype=asm --regalloc=fast 2>&1 | FileCheck %s +; +; Equivalent C source code +; register unsigned r6 asm("r6"); +; void bar(unsigned int i, +; unsigned int j, +; unsigned int k, +; unsigned int l, +; unsigned int m, +; unsigned int n, +; unsigned int o, +; unsigned int p) +; { +; r6 = 10; +; unsigned int result = i + j + k + l + m + n + o + p; +; } +declare void @llvm.write_register.i32(metadata, i32) nounwind + +define void @bar(i32 %i, i32 %j, i32 %k, i32 %l, i32 %m, i32 %n, i32 %o, i32 %p) nounwind { +entry: +; CHECK-NOT: push {{{.*}}r6,{{.*}}} +; CHECK: {{.*}}mov{{.*}}r6,{{.*}} +; CHECK-NOT: {{.*}}r6{{.*}} + %i.addr = alloca i32, align 4 + %j.addr = alloca i32, align 4 + %k.addr = alloca i32, align 4 + %l.addr = alloca i32, align 4 + %m.addr = alloca i32, align 4 + %n.addr = alloca i32, align 4 + %o.addr = alloca i32, align 4 + %p.addr = alloca i32, align 4 + %result = alloca i32, align 4 + store i32 %i, i32* %i.addr, align 4 + store i32 %j, i32* %j.addr, align 4 + store i32 %k, i32* %k.addr, align 4 + store i32 %l, i32* %l.addr, align 4 + store i32 %m, i32* %m.addr, align 4 + store i32 %n, i32* %n.addr, align 4 + store i32 %o, i32* %o.addr, align 4 + store i32 %p, i32* %p.addr, align 4 + call void @llvm.write_register.i32(metadata !0, i32 10) + %0 = load i32, i32* %i.addr, align 4 + %1 = load i32, i32* %j.addr, align 4 + %add = add i32 %0, %1 + %2 = load i32, i32* %k.addr, align 4 + %add1 = add i32 %add, %2 + %3 = load i32, i32* %l.addr, align 4 + %add2 = add i32 %add1, %3 + %4 = load i32, i32* %m.addr, align 4 + %add3 = add i32 %add2, %4 + %5 = load i32, i32* %n.addr, align 4 + %add4 = add i32 %add3, %5 + %6 = load i32, i32* %o.addr, align 4 + %add5 = add i32 %add4, %6 + %7 = load i32, i32* %p.addr, align 4 + %add6 = add i32 %add5, %7 + store i32 %add6, i32* %result, align 4 + ret void +} + +!llvm.named.register.r6 = !{!0} +!0 = !{!"r6"} + diff --git a/llvm/test/CodeGen/ARM/reg-alloc-with-fixed-reg-r6.ll b/llvm/test/CodeGen/ARM/reg-alloc-with-fixed-reg-r6.ll new file mode 100644 index 00000000000..3647c0701a7 --- /dev/null +++ b/llvm/test/CodeGen/ARM/reg-alloc-with-fixed-reg-r6.ll @@ -0,0 +1,57 @@ +; RUN: llc < %s -mattr=+reserve-r6 -mtriple=arm-linux-gnueabi -O0 -filetype=asm --regalloc=fast 2>&1 | FileCheck %s +; +; Equivalent C source code +; void bar(unsigned int i, +; unsigned int j, +; unsigned int k, +; unsigned int l, +; unsigned int m, +; unsigned int n, +; unsigned int o, +; unsigned int p) +; { +; unsigned int result = i + j + k + l + m + n + o + p; +; } + +define void @bar(i32 %i, i32 %j, i32 %k, i32 %l, i32 %m, i32 %n, i32 %o, i32 %p) nounwind { +entry: +; CHECK-NOT: push {{{.*}}r6,{{.*}}} + %i.addr = alloca i32, align 4 + %j.addr = alloca i32, align 4 + %k.addr = alloca i32, align 4 + %l.addr = alloca i32, align 4 + %m.addr = alloca i32, align 4 + %n.addr = alloca i32, align 4 + %o.addr = alloca i32, align 4 + %p.addr = alloca i32, align 4 + %result = alloca i32, align 4 + store i32 %i, i32* %i.addr, align 4 + store i32 %j, i32* %j.addr, align 4 + store i32 %k, i32* %k.addr, align 4 + store i32 %l, i32* %l.addr, align 4 + store i32 %m, i32* %m.addr, align 4 + store i32 %n, i32* %n.addr, align 4 + store i32 %o, i32* %o.addr, align 4 + store i32 %p, i32* %p.addr, align 4 + %0 = load i32, i32* %i.addr, align 4 + %1 = load i32, i32* %j.addr, align 4 + %add = add i32 %0, %1 + %2 = load i32, i32* %k.addr, align 4 + %add1 = add i32 %add, %2 + %3 = load i32, i32* %l.addr, align 4 + %add2 = add i32 %add1, %3 + %4 = load i32, i32* %m.addr, align 4 + %add3 = add i32 %add2, %4 + %5 = load i32, i32* %n.addr, align 4 + %add4 = add i32 %add3, %5 + %6 = load i32, i32* %o.addr, align 4 + %add5 = add i32 %add4, %6 + %7 = load i32, i32* %p.addr, align 4 + %add6 = add i32 %add5, %7 + store i32 %add6, i32* %result, align 4 +; CHECK: {{.*}}r5{{.*}} +; CHECK-NOT: {{.*}}r6{{.*}} + ret void +; CHECK-NOT: pop {{{.*}}r6,{{.*}}} +} + diff --git a/llvm/test/CodeGen/ARM/reg-alloc-wout-fixed-regs.ll b/llvm/test/CodeGen/ARM/reg-alloc-wout-fixed-regs.ll new file mode 100644 index 00000000000..d1f020936a3 --- /dev/null +++ b/llvm/test/CodeGen/ARM/reg-alloc-wout-fixed-regs.ll @@ -0,0 +1,58 @@ +; RUN: llc < %s -mtriple=arm-linux-gnueabi -O0 -filetype=asm --regalloc=fast 2>&1 | FileCheck %s +; +; Equivalent C source code +; void bar(unsigned int i, +; unsigned int j, +; unsigned int k, +; unsigned int l, +; unsigned int m, +; unsigned int n, +; unsigned int o, +; unsigned int p) +; { +; unsigned int result = i + j + k + l + m + n + o + p; +; } + +define void @bar(i32 %i, i32 %j, i32 %k, i32 %l, i32 %m, i32 %n, i32 %o, i32 %p) nounwind { +entry: +; CHECK: push {{{.*}}r4, r5{{.*}}} + %i.addr = alloca i32, align 4 + %j.addr = alloca i32, align 4 + %k.addr = alloca i32, align 4 + %l.addr = alloca i32, align 4 + %m.addr = alloca i32, align 4 + %n.addr = alloca i32, align 4 + %o.addr = alloca i32, align 4 + %p.addr = alloca i32, align 4 + %result = alloca i32, align 4 + store i32 %i, i32* %i.addr, align 4 + store i32 %j, i32* %j.addr, align 4 + store i32 %k, i32* %k.addr, align 4 + store i32 %l, i32* %l.addr, align 4 + store i32 %m, i32* %m.addr, align 4 + store i32 %n, i32* %n.addr, align 4 + store i32 %o, i32* %o.addr, align 4 + store i32 %p, i32* %p.addr, align 4 + %0 = load i32, i32* %i.addr, align 4 + %1 = load i32, i32* %j.addr, align 4 + %add = add i32 %0, %1 + %2 = load i32, i32* %k.addr, align 4 + %add1 = add i32 %add, %2 + %3 = load i32, i32* %l.addr, align 4 + %add2 = add i32 %add1, %3 + %4 = load i32, i32* %m.addr, align 4 + %add3 = add i32 %add2, %4 + %5 = load i32, i32* %n.addr, align 4 + %add4 = add i32 %add3, %5 + %6 = load i32, i32* %o.addr, align 4 + %add5 = add i32 %add4, %6 + %7 = load i32, i32* %p.addr, align 4 + %add6 = add i32 %add5, %7 + store i32 %add6, i32* %result, align 4 +; CHECK: {{.*}}r4{{.*}} +; CHECK: {{.*}}r5{{.*}} + +; CHECK: pop {{{.*}}r4, r5{{.*}}} + ret void +} + |
