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551d6b4075
gc.statepoint intrinsics with a far immediate call target were lowered incorrectly as pc-rel32 calls. This change fixes the problem, and generates an indirect call via a scratch register. For example: Intrinsic: %safepoint_token = call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* inttoptr (i64 140727162896504 to void ()*), i32 0, i32 0, i32 0, i32 0) Old Incorrect Lowering: callq 140727162896504 New Correct Lowering: movabsq $140727162896504, %rax callq *%rax In lowerCallFromStatepoint(), the callee-target was modified and represented as a "TargetConstant" node, rather than a "Constant" node. Undoing this modification enabled LowerCall() to generate the correct CALL instruction. llvm-svn: 239114
23 lines
798 B
LLVM
23 lines
798 B
LLVM
; RUN: llc < %s | FileCheck %s
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; Test to check that Statepoints with X64 far-immediate targets
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; are lowered correctly to an indirect call via a scratch register.
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target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-win64"
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define void @test_far_call() gc "statepoint-example" {
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; CHECK-LABEL: test_far_call
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; CHECK: pushq %rax
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; CHECK: movabsq $140727162896504, %rax
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; CHECK: callq *%rax
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; CHECK: popq %rax
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; CHECK: retq
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entry:
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%safepoint_token = call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* inttoptr (i64 140727162896504 to void ()*), i32 0, i32 0, i32 0, i32 0)
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ret void
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}
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declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
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