af12879146
Fix an issue about module linking with LTO.
When compiling with PIE, the small data limitation needs to be consistent with that in PIC, otherwise there will be linking errors due to conflicting values.
bar.c
```
int bar() { return 1; }
```
foo.c
```
int foo() { return 1; }
```
```
clang --target=riscv64-unknown-linux-gnu -flto -c foo.c -o foo.o -fPIE
clang --target=riscv64-unknown-linux-gnu -flto -c bar.c -o bar.o -fPIC
clang --target=riscv64-unknown-linux-gnu -flto foo.o bar.o -flto -nostdlib -v -fuse-ld=lld
```
```
ld.lld: error: linking module flags 'SmallDataLimit': IDs have conflicting values in 'bar.o' and 'ld-temp.o'
clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
```
Use Min instead of Error for conflicting SmallDataLimit.
Authored by: @joshua-arch1
Signed-off-by: xiaojing.zhang <xiaojing.zhang@xcalibyte.com>
Signed-off-by: jianxin.lai <jianxin.lai@xcalibyte.com>
Reviewed By: MaskRay
Differential Revision: https://reviews.llvm.org/D131230
52 lines
2.1 KiB
LLVM
52 lines
2.1 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt -passes=loop-vectorize,dce,instcombine -mtriple riscv64-linux-gnu \
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; RUN: -mattr=+v -debug-only=loop-vectorize \
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; RUN: -riscv-v-vector-bits-min=128 -scalable-vectorization=off -S < %s 2>&1 | FileCheck %s
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; CHECK-LABEL: foo
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; CHECK: LV: IC is 2
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; CHECK: %{{.*}} = add <4 x i32> %{{.*}}, <i32 4, i32 4, i32 4, i32 4>
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; CHECK: %{{.*}} = add {{.*}}, 8
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; Function Attrs: nofree norecurse nosync nounwind writeonly
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define dso_local void @foo(i32 signext %n, ptr nocapture %A) local_unnamed_addr #0 {
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entry:
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%cmp5 = icmp sgt i32 %n, 0
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br i1 %cmp5, label %for.body.preheader, label %for.cond.cleanup
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for.body.preheader: ; preds = %entry
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%wide.trip.count = zext i32 %n to i64
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br label %for.body
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for.cond.cleanup.loopexit: ; preds = %for.body
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br label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
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ret void
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
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%0 = trunc i64 %indvars.iv to i32
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store i32 %0, ptr %arrayidx, align 4, !tbaa !4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
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br i1 %exitcond.not, label %for.cond.cleanup.loopexit, label %for.body, !llvm.loop !8
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}
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attributes #0 = { nofree norecurse nosync nounwind writeonly "frame-pointer"="none" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+64bit,+a,+c,+m,+relax,-save-restore" }
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!llvm.module.flags = !{!0, !1, !2}
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!llvm.ident = !{!3}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = !{i32 1, !"target-abi", !"lp64"}
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!2 = !{i32 8, !"SmallDataLimit", i32 8}
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!3 = !{!"clang version 13.0.0"}
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!4 = !{!5, !5, i64 0}
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!5 = !{!"int", !6, i64 0}
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!6 = !{!"omnipotent char", !7, i64 0}
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!7 = !{!"Simple C/C++ TBAA"}
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!8 = distinct !{!8, !9}
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!9 = !{!"llvm.loop.mustprogress"}
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