eba76056a3
Function specialization was crashing on poison values and constexpr values. The problem is that these values are not added to the solver, so it crashes when a lookup is performed for these values. This fixes that by not specialising on these values. For poison that is obvious, but for constexpr this is a change in behaviour. Thus, in one way this is a bit of a stopgap, but specialising on constexpr values wasn't done very intentionally, and need some more work and tests if we wanted to support this. As a follow up, we need to look if the solver should exit more gracefully and return a "don't know", or that it should really support these constexprs. This should fix PR51600 (https://bugs.llvm.org/show_bug.cgi?id=51600). Differential Revision: https://reviews.llvm.org/D110529
45 lines
1.7 KiB
LLVM
45 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -function-specialization -force-function-specialization -S < %s | FileCheck %s
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; Check that we don't crash and specialise on a constant expression.
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%struct.pluto = type { %struct.spam }
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%struct.quux = type { i16 }
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%struct.spam = type { i16 }
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@global.5 = external dso_local global [4 x %struct.pluto], align 1
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@global.12 = external global %struct.quux, align 1
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define internal i16 @wobble.972(%struct.quux* byval(%struct.quux) align 1 %arg, i16 %arg1, %struct.spam* byval(%struct.spam) align 1 %arg2, %struct.quux* byval(%struct.quux) align 1 %arg3) #4 {
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; CHECK-LABEL: @wobble.972(
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; CHECK-NEXT: bb:
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; CHECK-NEXT: [[TMP34:%.*]] = bitcast %struct.spam* [[ARG2:%.*]] to i16*
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; CHECK-NEXT: unreachable
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;
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bb:
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%tmp34 = bitcast %struct.spam* %arg2 to i16*
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unreachable
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}
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define internal i16 @snork() {
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; CHECK-LABEL: @snork(
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; CHECK-NEXT: bb4:
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; CHECK-NEXT: [[TMP:%.*]] = call i16 @wobble.972(%struct.quux* byval([[STRUCT_QUUX:%.*]]) align 1 undef, i16 undef, %struct.spam* byval([[STRUCT_SPAM:%.*]]) align 1 getelementptr inbounds ([4 x %struct.pluto], [4 x %struct.pluto]* @global.5, i32 0, i32 3, i32 0), %struct.quux* byval([[STRUCT_QUUX]]) align 1 @global.12)
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; CHECK-NEXT: unreachable
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;
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bb4:
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%tmp = call i16 @wobble.972(%struct.quux* byval(%struct.quux) align 1 undef, i16 undef, %struct.spam* byval(%struct.spam) align 1 getelementptr inbounds ([4 x %struct.pluto], [4 x %struct.pluto]* @global.5, i32 0, i32 3, i32 0), %struct.quux* byval(%struct.quux) align 1 @global.12)
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unreachable
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}
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define i16 @main() {
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; CHECK-LABEL: @main(
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; CHECK-NEXT: bb:
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; CHECK-NEXT: [[TMP:%.*]] = call i16 @snork()
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; CHECK-NEXT: unreachable
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;
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bb:
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%tmp = call i16 @snork()
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unreachable
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}
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