9677cc6fb7
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
131 lines
4.1 KiB
LLVM
131 lines
4.1 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s
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; RUN: llc < %s -disable-simplify-libcalls -mtriple=x86_64-linux | FileCheck %s --check-prefix=NOBUILTIN
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; RUN: llc < %s -mtriple=x86_64-win32 | FileCheck %s
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; This tests codegen time inlining/optimization of memcmp
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; rdar://6480398
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@.str = private constant [23 x i8] c"fooooooooooooooooooooo\00", align 1 ; <[23 x i8]*> [#uses=1]
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declare i32 @memcmp(i8*, i8*, i64)
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define void @memcmp2(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
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entry:
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%0 = tail call i32 @memcmp(i8* %X, i8* %Y, i64 2) nounwind ; <i32> [#uses=1]
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%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
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br i1 %1, label %return, label %bb
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bb: ; preds = %entry
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store i32 4, i32* %P, align 4
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ret void
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return: ; preds = %entry
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ret void
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; CHECK-LABEL: memcmp2:
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; CHECK: movzwl
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; CHECK-NEXT: cmpw
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; NOBUILTIN-LABEL: memcmp2:
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; NOBUILTIN: callq
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}
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define void @memcmp2a(i8* %X, i32* nocapture %P) nounwind {
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entry:
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%0 = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str, i32 0, i32 1), i64 2) nounwind ; <i32> [#uses=1]
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%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
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br i1 %1, label %return, label %bb
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bb: ; preds = %entry
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store i32 4, i32* %P, align 4
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ret void
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return: ; preds = %entry
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ret void
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; CHECK-LABEL: memcmp2a:
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; CHECK: movzwl
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; CHECK-NEXT: cmpl $28527,
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}
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define void @memcmp2nb(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
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entry:
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%0 = tail call i32 @memcmp(i8* %X, i8* %Y, i64 2) nounwind nobuiltin ; <i32> [#uses=1]
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%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
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br i1 %1, label %return, label %bb
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bb: ; preds = %entry
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store i32 4, i32* %P, align 4
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ret void
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return: ; preds = %entry
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ret void
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; CHECK-LABEL: memcmp2nb:
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; CHECK: callq
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}
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define void @memcmp4(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
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entry:
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%0 = tail call i32 @memcmp(i8* %X, i8* %Y, i64 4) nounwind ; <i32> [#uses=1]
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%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
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br i1 %1, label %return, label %bb
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bb: ; preds = %entry
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store i32 4, i32* %P, align 4
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ret void
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return: ; preds = %entry
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ret void
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; CHECK-LABEL: memcmp4:
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; CHECK: movl
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; CHECK-NEXT: cmpl
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}
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define void @memcmp4a(i8* %X, i32* nocapture %P) nounwind {
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entry:
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%0 = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str, i32 0, i32 1), i64 4) nounwind ; <i32> [#uses=1]
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%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
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br i1 %1, label %return, label %bb
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bb: ; preds = %entry
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store i32 4, i32* %P, align 4
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ret void
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return: ; preds = %entry
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ret void
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; CHECK-LABEL: memcmp4a:
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; CHECK: cmpl $1869573999,
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}
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define void @memcmp8(i8* %X, i8* %Y, i32* nocapture %P) nounwind {
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entry:
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%0 = tail call i32 @memcmp(i8* %X, i8* %Y, i64 8) nounwind ; <i32> [#uses=1]
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%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
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br i1 %1, label %return, label %bb
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bb: ; preds = %entry
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store i32 4, i32* %P, align 4
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ret void
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return: ; preds = %entry
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ret void
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; CHECK-LABEL: memcmp8:
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; CHECK: movq
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; CHECK: cmpq
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}
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define void @memcmp8a(i8* %X, i32* nocapture %P) nounwind {
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entry:
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%0 = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str, i32 0, i32 0), i64 8) nounwind ; <i32> [#uses=1]
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%1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
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br i1 %1, label %return, label %bb
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bb: ; preds = %entry
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store i32 4, i32* %P, align 4
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ret void
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return: ; preds = %entry
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ret void
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; CHECK-LABEL: memcmp8a:
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; CHECK: movabsq $8029759185026510694,
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; CHECK: cmpq
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}
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