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3bd74bda76
This reverts commit 59b22e495c15d2830f41381a327f5d6bf49ff416.
That commit broke building for ARM and AArch64, reproducible like this:
$ cat apedec-reduced.c
a;
b(e) {
int c;
unsigned d = f();
c = d >> 32 - e;
return c;
}
g() {
int h = i();
if (a)
h = h << a | b(a);
return h;
}
$ clang -target aarch64-linux-gnu -w -c -O3 apedec-reduced.c
clang: ../lib/Transforms/InstCombine/InstructionCombining.cpp:3656: bool llvm::InstCombinerImpl::run(): Assertion `DT.dominates(BB, UserParent) && "Dominance relation broken?"' failed.
Same thing for e.g. an armv7-linux-gnueabihf target.