# RUN: llc -mtriple=x86_64-gnu-linux -run-pass=machine-combiner %s -o - | FileCheck %s --- | define float @reassoc_me(float %f1, float %f2, float %f3, float %f4) !dbg !4 { %add = fadd reassoc nsz float %f1, %f2, !dbg !10 %add1 = fadd reassoc nsz float %add, %f3, !dbg !10 %add2 = fadd reassoc nsz float %add1, %f4, !dbg !10 call void @llvm.dbg.value(metadata float %add2, metadata !9, metadata !DIExpression()), !dbg !10 ret float %add2, !dbg !10 } declare void @llvm.dbg.value(metadata, metadata, metadata) !llvm.dbg.cu = !{!0} !llvm.module.flags = !{!2, !3} !0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "hello", isOptimized: true, emissionKind: FullDebug) !1 = !DIFile(filename: "reassoc.c", directory: "blah") !2 = !{i32 7, !"Dwarf Version", i32 4} !3 = !{i32 2, !"Debug Info Version", i32 3} !4 = distinct !DISubprogram(name: "reassoc_me", scope: !1, file: !1, line: 1, type: !5, scopeLine: 1, unit: !0, retainedNodes: !8) !5 = !DISubroutineType(types: !6) !6 = !{!7, !7, !7, !7, !7} !7 = !DIBasicType(name: "float", size: 32, encoding: DW_ATE_float) !8 = !{!9} !9 = !DILocalVariable(name: "temp3", scope: !4, file: !1, line: 4, type: !7) !10 = !DILocation(line: 0, scope: !4) ... --- name: reassoc_me alignment: 16 debugInstrRef: true body: | bb.0 (%ir-block.0): liveins: $xmm0, $xmm1, $xmm2, $xmm3 %3:fr32 = COPY $xmm3 %2:fr32 = COPY $xmm2 %1:fr32 = COPY $xmm1 %0:fr32 = COPY $xmm0 %4:fr32 = nsz reassoc nofpexcept ADDSSrr %0, %1, implicit $mxcsr, debug-location !10 %5:fr32 = nsz reassoc nofpexcept ADDSSrr %4, %2, implicit $mxcsr, debug-location !10 %6:fr32 = nsz reassoc nofpexcept ADDSSrr %5, %3, implicit $mxcsr, debug-instr-number 1, debug-location !10 DBG_INSTR_REF !9, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !10 $xmm0 = COPY %6, debug-location !10 RET 0, $xmm0, debug-location !10 ; CHECK: ![[VAR:.*]] = !DILocalVariable(name: "temp3" ; CHECK: %[[arg3:.*]]:fr32 = COPY $xmm3 ; CHECK-NEXT: %[[arg2:.*]]:fr32 = COPY $xmm2 ; CHECK-NEXT: %[[arg1:.*]]:fr32 = COPY $xmm1 ; CHECK-NEXT: %[[arg0:.*]]:fr32 = COPY $xmm0 ; CHECK-NEXT: %[[add1:.*]]:fr32 = {{.*}} ADDSSrr %[[arg0]], %[[arg1]] ; CHECK-NEXT: %[[add2:.*]]:fr32 = {{.*}} ADDSSrr %[[arg2]], %[[arg3]] ; CHECK-NEXT: ADDSSrr %[[add1]], killed %[[add2]], {{.*}} debug-instr-number 1 ; CHECK-NEXT: DBG_INSTR_REF ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0) ...