0ace96cca7
Fixes #155738. The original assumption "we already replaced its users with a constant" for the global variable becomes incorrect after #154668. The users in the dead function are not simplified, in fact. This patch poisons all the unsimplified constant global variable users.
32 lines
896 B
LLVM
32 lines
896 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -passes=ipsccp --funcspec-min-function-size=1 -S < %s | FileCheck %s
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@gv = internal global ptr null
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define i8 @caller() {
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; CHECK-LABEL: define i8 @caller() {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[CALL1:%.*]] = call i8 @callee.specialized.1(i32 1)
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; CHECK-NEXT: [[CALL2:%.*]] = call i8 @callee.specialized.2(i32 0)
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; CHECK-NEXT: ret i8 undef
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;
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entry:
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%call1 = call i8 @callee(i32 1)
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%call2 = call i8 @callee(i32 0)
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ret i8 %call2
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}
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define internal i8 @callee(i32 %arg) {
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entry:
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%useless = icmp ne i32 %arg, 0
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br label %loop
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loop: ; preds = %loop, %entry
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br label %loop
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dead_bb: ; No predecessors!
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%l1 = load ptr, ptr @gv, align 8
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%l2 = load ptr, ptr %l1, align 8
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ret i8 0
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}
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