8e8d2595da
This patch canonicalizes constant expression GEPs to use i8 source element type, aka ptradd. This is the ConstantFolding equivalent of the InstCombine canonicalization introduced in #68882. I believe all our optimizations working on constant expression GEPs (like GlobalOpt etc) have already been switched to work on offsets, so I don't expect any significant fallout from this change. This is part of: https://discourse.llvm.org/t/rfc-replacing-getelementptr-with-ptradd/68699
16 lines
516 B
C
16 lines
516 B
C
// RUN: %clang_cc1 -O3 -triple x86_64-apple-macosx10.10 -main-file-name c-unreachable-after-switch.c %s -o - -emit-llvm -fprofile-instrument=clang | FileCheck %s
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// CHECK: @[[C:__profc_foo]] = private global [3 x i64] zeroinitializer
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// CHECK-LABEL: @foo()
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// CHECK: store {{.*}} @[[C]]
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void foo(void) {
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// CHECK: store {{.*}} @[[C]], i64 16)
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switch (0) {
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default:
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return;
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}
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// We shouldn't emit the unreachable counter. This used to crash in GlobalDCE.
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// CHECK-NOT: store {{.*}} @[[C]], i64 8)
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}
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