c6c89bffdc
This removes some duplication from splitCallSite and makes it easier to add additional code dealing with each predecessor. It also allows us to split for more than 2 predecessors, although that is not enabled for now. Reviewers: junbuml, mcrosier, davidxl, davide Reviewed By: junbuml Differential Revision: https://reviews.llvm.org/D41858 llvm-svn: 322599
58 lines
1.7 KiB
LLVM
58 lines
1.7 KiB
LLVM
; RUN: opt -S -callsite-splitting -o - < %s | FileCheck %s
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; RUN: opt -S -strip-debug -callsite-splitting -o - < %s | FileCheck %s
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define internal i16 @bar(i16 %p1, i16 %p2) {
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%_tmp3 = mul i16 %p2, %p1
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ret i16 %_tmp3
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}
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define i16 @foo(i16 %in) {
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bb0:
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br label %bb1
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bb1:
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%0 = icmp ne i16 %in, 0
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br i1 %0, label %bb2, label %CallsiteBB
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bb2:
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br label %CallsiteBB
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CallsiteBB:
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%1 = phi i16 [ 0, %bb1 ], [ 1, %bb2 ]
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%c = phi i16 [ 2, %bb1 ], [ 3, %bb2 ]
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call void @llvm.dbg.value(metadata i16 %c, metadata !7, metadata !DIExpression()), !dbg !8
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%2 = call i16 @bar(i16 %1, i16 5)
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ret i16 %2
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}
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #0
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attributes #0 = { nounwind readnone speculatable }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3}
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!llvm.ident = !{!4}
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!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "My Compiler")
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!1 = !DIFile(filename: "foo.c", directory: "/bar")
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!2 = !{i32 2, !"Dwarf Version", i32 4}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{!"My Compiler"}
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!5 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed)
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!6 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 4, unit: !0)
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!7 = !DILocalVariable(name: "c", scope: !6, line: 5, type: !5)
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!8 = !DILocation(line: 5, column: 7, scope: !6)
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; The optimization should trigger even in the presence of the dbg.value in
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; CallSiteBB.
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; CHECK-LABEL: @foo
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; CHECK-LABEL: CallsiteBB.predBB.split:
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; CHECK: [[TMP1:%[0-9]+]] = call i16 @bar(i16 1, i16 5)
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; CHECK-LABEL: CallsiteBB.predBB.split1:
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; CHECK: [[TMP2:%[0-9]+]] = call i16 @bar(i16 0, i16 5)
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; CHECK-LABEL: CallsiteBB
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; CHECK: %phi.call = phi i16 [ [[TMP1]], %CallsiteBB.predBB.split ], [ [[TMP2]], %CallsiteBB.predBB.split1
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