search for: _tmp30

...i, I'm having a problem with GVN removing a load instruction that I think is needed. Dump before GVN: *** IR Dump Before Global Value Numbering *** ; Function Attrs: minsize optsize define i16 @TEST__MAIN(i16 %argc.13.par, i16** %argv.14.par) #0 { %buf.17 = alloca [10 x i16], align 1 %_tmp30 = getelementptr inbounds [10 x i16], [10 x i16]* %buf.17, i16 0, i16 0, !dbg !22 call fastcc void @format_long(i16* %_tmp30, i16 10, i32 10), !dbg !22 %_tmp32 = getelementptr [10 x i16], [10 x i16]* %buf.17, i16 0, i16 0, !dbg !24 %_tmp33 = load i16, i16* %_tmp32, align 1, !dbg !24 ca...

Hi, On 08/07/2015 10:30 PM, Nick Lewycky wrote: [...] > Depends. What is the exact declaration of format_long? > > > In the input .ll file it is: > > ; Function Attrs: minsize optsize > define internal i16 @format_long(i16* %res.8.par, i16 %base.9.par, > i32 %x.10.par) #3 { > > which is later changed somewhere in opt to: > > ;

...;> From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] >> On Behalf Of Mikael Holmén via llvm-dev >> Subject: [llvm-dev] load instruction erroneously removed by GVN > >> But between the load and the alloca there is also >> call fastcc void @format_long(i16* %_tmp30, i16 10, i32 10), !dbg !22 >> which will use %_tmp30 to write in the alloca'd buffer. > >> Shoulnd't MemoryDependenceAnalysis::getDependency rather return the call? > > Depends. What is the exact declaration of format_long? In the input .ll file it is: ; Function Att...

...%int4 %_tmp24 to i64 %_tmp26 = getelementptr %arr18, %ptr20 %_tmp23, i16 0, i64 %_tmp25 store %int4 %_tmp22, %ptr7 %_tmp26 br label %bb5 bb5: %_tmp27 = load %int4, %ptr7 %cach1.11 %_tmp28 = icmp eq %int4 %_tmp27, 7 br i1 %_tmp28, label %bb6, label %bb_usw2 bb6: %_tmp29 = load %int4, %ptr7 %step1.7 %_tmp30 = icmp eq %int4 %_tmp29, 0 %_tmp31 = select i1 %_tmp30, %int4 1, %int4 0 call void @CVAL_VERIFY_FUNC(%int4 %_tmp31) %_tmp32 = load %ptr20, %ptr26 %liv1.12 %_tmp33 = load %int4, %ptr7 %step1.7 %_tmp34 = sext %int4 %_tmp33 to i64 %_tmp35 = getelementptr %arr18, %ptr20 %_tmp32, i16 0, i64 %_tmp34 %_tm...