a6a07a514b
MachineOutliner may outline a "patchable-function-entry" function whose body has a TargetOpcode::PATCHABLE_FUNCTION_ENTER MachineInstr. This is incorrect because the special code sequence must stay unchanged to be used at run-time. Avoid outlining PATCHABLE_FUNCTION_ENTER. While here, avoid outlining FENTRY_CALL too (which doesn't reproduce currently) to allow phase ordering flexibility. Fixes #52635 Reviewed By: paquette Differential Revision: https://reviews.llvm.org/D115614
78 lines
2.1 KiB
LLVM
78 lines
2.1 KiB
LLVM
; RUN: llc < %s -verify-machineinstrs -enable-machine-outliner | FileCheck %s
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target triple = "riscv64-unknown-linux-gnu"
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declare void @foo(i32, i32, i32, i32) minsize
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;; TargetOpcode::FENTRY_CALL at the start of the function expands to a __fentry__
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;; call which must be present. Don't outline it.
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define void @fentry0(i1 %a) nounwind "fentry-call"="true" {
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; CHECK-LABEL: fentry0:
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; CHECK-NEXT: # %bb.0:
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; CHECK-NEXT: # FEntry call
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; CHECK: # %bb.1:
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; CHECK-NEXT: call t0, OUTLINED_FUNCTION_1
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entry:
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br i1 %a, label %if.then, label %if.end
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if.then:
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call void @foo(i32 1, i32 2, i32 3, i32 4)
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br label %if.end
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if.end:
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call void @foo(i32 5, i32 6, i32 7, i32 8)
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ret void
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}
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define void @fentry1(i1 %a) nounwind "fentry-call"="true" {
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; CHECK-LABEL: fentry1:
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; CHECK-NEXT: # %bb.0:
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; CHECK-NEXT: # FEntry call
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; CHECK: # %bb.1:
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; CHECK-NEXT: call t0, OUTLINED_FUNCTION_1
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entry:
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br i1 %a, label %if.then, label %if.end
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if.then:
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call void @foo(i32 1, i32 2, i32 3, i32 4)
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br label %if.end
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if.end:
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call void @foo(i32 5, i32 6, i32 7, i32 8)
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ret void
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}
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;; TargetOpcode::PATCHABLE_FUNCTION_ENTER at the start of the function expands to
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;; NOPs which must be present. Don't outline them.
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define void @patchable0(i1 %a) nounwind "patchable-function-entry"="2" {
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; CHECK-LABEL: patchable0:
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; CHECK-NEXT: .Lfunc_begin0:
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; CHECK-NEXT: # %bb.0:
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; CHECK-NEXT: nop
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; CHECK-NEXT: nop
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; CHECK: # %bb.1:
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; CHECK-NEXT: call t0, OUTLINED_FUNCTION_1
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entry:
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br i1 %a, label %if.then, label %if.end
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if.then:
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call void @foo(i32 1, i32 2, i32 3, i32 4)
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br label %if.end
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if.end:
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call void @foo(i32 5, i32 6, i32 7, i32 8)
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ret void
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}
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define void @patchable1(i1 %a) nounwind "patchable-function-entry"="2" {
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; CHECK-LABEL: patchable1:
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; CHECK-NEXT: .Lfunc_begin1:
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; CHECK-NEXT: # %bb.0:
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; CHECK-NEXT: nop
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; CHECK-NEXT: nop
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; CHECK: # %bb.1:
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; CHECK-NEXT: call t0, OUTLINED_FUNCTION_1
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entry:
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br i1 %a, label %if.then, label %if.end
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if.then:
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call void @foo(i32 1, i32 2, i32 3, i32 4)
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br label %if.end
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if.end:
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call void @foo(i32 5, i32 6, i32 7, i32 8)
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ret void
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}
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