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86ba72cd49
This re-applies commit r292189, reverted in r292191. SelectionDAGBuilder recognizes libfuncs using some homegrown parameter type-checking. Use TLI instead, removing another heap of redundant code. This isn't strictly NFC, as the SDAG code was too lax. Concretely, this means changes are required to a few tests: - calling a non-variadic function via a variadic prototype isn't OK; it just happens to work on x86_64 (but not on, e.g., aarch64). - mempcpy has a size_t parameter; the SDAG code accepts any integer type, which meant using i32 on x86_64 worked. - a handful of SystemZ tests check the SDAG support for lax prototype checking: Ulrich agrees on removing them. I don't think it's worth supporting any of these (IMO) invalid testcases. Instead, fix them to be more meaningful. llvm-svn: 294028
21 lines
564 B
LLVM
21 lines
564 B
LLVM
; RUN: llc < %s -mtriple=i686-unknown-linux -O2 | FileCheck %s
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; This tests the i686 lowering of mempcpy.
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; Also see mempcpy.ll
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@G = common global i8* null, align 8
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; CHECK-LABEL: RET_MEMPCPY:
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; CHECK: movl [[REG:%e[a-z0-9]+]], {{.*}}G
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; CHECK: calll {{.*}}memcpy
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; CHECK: movl [[REG]], %eax
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;
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define i8* @RET_MEMPCPY(i8* %DST, i8* %SRC, i32 %N) {
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%add.ptr = getelementptr inbounds i8, i8* %DST, i32 %N
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store i8* %add.ptr, i8** @G, align 8
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%call = tail call i8* @mempcpy(i8* %DST, i8* %SRC, i32 %N)
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ret i8* %call
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}
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declare i8* @mempcpy(i8*, i8*, i32)
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