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After the dataflow algorithm proves that an argument is constant, it replaces it value with the integer constant and drops the lattice value associated to the DEF. e.g. in the example we have @f() that's called twice: call @f(undef, ...) call @f(2, ...) `undef` MEET 2 = 2 so we replace the argument and all its uses with the constant 2. Shortly after, tryToReplaceWithConstantRange() tries to get the lattice value for the argument we just replaced, causing an assertion. This function is a little peculiar as it runs when we're doing replacement and not as part of the solver but still queries the solver. The fix is that of checking whether we replaced the value already and get a temporary lattice value for the constant. Thanks to Zhendong Su for the report! Fixes PR35357. llvm-svn: 318817
25 lines
455 B
LLVM
25 lines
455 B
LLVM
; RUN: opt -S %s -ipsccp | FileCheck %s
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@a = internal global i32 2
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define i32 @patatino() {
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; CHECK: @patatino(
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; CHECK: call void @f(i32 undef, i32 1)
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; CHECK-NEXT: call void @f(i32 2, i32 0)
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; CHECK-NEXT: ret i32 0
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entry:
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call void @f(i32 undef, i32 1)
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%0 = load i32, i32* @a
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call void @f(i32 %0, i32 0)
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ret i32 0
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}
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define internal void @f(i32 %c, i32 %d) {
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; CHECK: @f(
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; CHECK: ret void
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;
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entry:
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%cmp = icmp ne i32 %c, %d
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ret void
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}
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