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100 lines
2.8 KiB
LLVM
100 lines
2.8 KiB
LLVM
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; RUN: llc -relocation-model=static -verify-machineinstrs < %s -mcpu=pwr7 | FileCheck %s
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; RUN: llc -relocation-model=static -verify-machineinstrs < %s -code-model=small -mcpu=pwr7 | FileCheck %s -check-prefix=SCM
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target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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define void @foo() nounwind noinline {
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ret void
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}
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define weak void @foo_weak() nounwind {
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ret void
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}
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; Calls to local function does not require the TOC restore 'nop'
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define void @test_direct() nounwind readnone {
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; CHECK-LABEL: test_direct:
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tail call void @foo() nounwind
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; Because of tail call optimization, it can be 'b' instruction.
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; CHECK: [[BR:b[l]?]] foo
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; CHECK-NOT: nop
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ret void
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}
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; Calls to weak function requires a TOC restore 'nop' with the small codemodel
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; because the definition that gets choosen at link time may come from a
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; different section even though we have seen a weak definition in the same
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; section at compile time.
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; With large and medium codemodels no TOC restore is needed, since we know
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; whichever definition is choosen it resides within the same DSO boundaries and
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; therefore shares the same TOC.
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define void @test_weak() nounwind readnone {
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tail call void @foo_weak() nounwind
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; CHECK-LABEL: test_weak:
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; CHECK: b foo_weak
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; CHECK-NOT: nop
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; SCM-LABEL: test_weak:
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; SCM: bl foo_weak
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; SCM-NEXT: nop
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ret void
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}
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; Indirect calls requires a full stub creation
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define void @test_indirect(void ()* nocapture %fp) nounwind {
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; CHECK-LABEL: test_indirect:
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tail call void %fp() nounwind
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; CHECK: ld [[FP:[0-9]+]], 0(3)
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; CHECK: ld 11, 16(3)
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; CHECK: ld 2, 8(3)
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; CHECK-NEXT: mtctr [[FP]]
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; CHECK-NEXT: bctrl
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; CHECK-NEXT: ld 2, 40(1)
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ret void
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}
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; Absolute values must use the regular indirect call sequence
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; The main purpose of this test is to ensure that BLA is not
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; used on 64-bit SVR4 (as e.g. on Darwin).
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define void @test_abs() nounwind {
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; CHECK-LABEL: test_abs:
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tail call void inttoptr (i64 1024 to void ()*)() nounwind
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; CHECK: ld [[FP:[0-9]+]], 1024(0)
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; CHECK: ld 11, 1040(0)
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; CHECK: ld 2, 1032(0)
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; CHECK-NEXT: mtctr [[FP]]
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; CHECK-NEXT: bctrl
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; CHECK-NEXT: ld 2, 40(1)
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ret void
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}
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declare double @sin(double) nounwind
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; External functions call should also have a 'nop'
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define double @test_external(double %x) nounwind {
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; CHECK-LABEL: test_external:
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%call = tail call double @sin(double %x) nounwind
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; CHECK: bl sin
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; CHECK-NEXT: nop
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ret double %call
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}
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; The 'ld 2, 40(1)' really must always come directly after the bctrl to make
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; the unwinding code in libgcc happy.
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@g = external global void ()*
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declare void @h(i64)
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define void @test_indir_toc_reload(i64 %x) {
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%1 = load void ()*, void ()** @g
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call void %1()
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call void @h(i64 %x)
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ret void
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; CHECK-LABEL: @test_indir_toc_reload
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; CHECK: bctrl
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; CHECK-NEXT: ld 2, 40(1)
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; CHECK: blr
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}
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