Test source: git
Source: <stdin> ---------------------------------------- @a = global 4000 bytes, align 16 @b = global 4000 bytes, align 16 define void @_Z3foov() { %entry: br label %for.cond %for.cond: %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ] %cmp = icmp ult i32 %i.0, 1000 br i1 %cmp, label %for.body, label %for.cond.cleanup %for.body: %0 = zext i32 %i.0 to i64 %arrayidx = gep inbounds ptr @a, 4000 x i64 0, 4 x i64 %0 %arrayidx2 = gep inbounds ptr @b, 4000 x i64 0, 4 x i64 %0 %1 = load float, ptr %arrayidx, align 4 %2 = load float, ptr %arrayidx2, align 4 %cmp.i = fcmp fast olt float %1, %2 %__b.__a.i = select i1 %cmp.i, ptr %arrayidx2, ptr %arrayidx %3 = load i32, ptr %__b.__a.i, align 4 store i32 %3, ptr %arrayidx, align 4 %inc = add nsw nuw i32 %i.0, 1 br label %for.cond %for.cond.cleanup: ret void } => @a = global 4000 bytes, align 16 @b = global 4000 bytes, align 16 define void @_Z3foov() { %entry: br label %for.cond %for.cond: %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ] %cmp = icmp ult i32 %i.0, 1000 br i1 %cmp, label %for.body, label %for.cond.cleanup %for.body: %0 = zext i32 %i.0 to i64 %arrayidx = gep inbounds ptr @a, 4000 x i64 0, 4 x i64 %0 %arrayidx2 = gep inbounds ptr @b, 4000 x i64 0, 4 x i64 %0 %1 = load float, ptr %arrayidx, align 4 %2 = load float, ptr %arrayidx2, align 4 %cmp.i = fcmp fast olt float %1, %2 %.v = select i1 %cmp.i, float %2, float %1 store float %.v, ptr %arrayidx, align 4 %inc = add nsw nuw i32 %i.0, 1 br label %for.cond %for.cond.cleanup: ret void } Transformation seems to be correct! ---------------------------------------- define i32 @store_bitcasted_load(i1 %cond, ptr dereferenceable(4) %addr1, ptr dereferenceable(4) %addr2) { %0: %sel = select i1 %cond, ptr dereferenceable(4) %addr1, ptr dereferenceable(4) %addr2 %ld = load i32, ptr %sel, align 4 ret i32 %ld } => define i32 @store_bitcasted_load(i1 %cond, ptr dereferenceable(4) %addr1, ptr dereferenceable(4) %addr2) { %0: %sel = select i1 %cond, ptr dereferenceable(4) %addr1, ptr dereferenceable(4) %addr2 %ld = load i32, ptr %sel, align 4 ret i32 %ld } Transformation seems to be correct! (syntactically equal) ---------------------------------------- define void @bitcasted_store(i1 %cond, ptr %loadaddr1, ptr %loadaddr2, ptr %storeaddr) { %0: %sel = select i1 %cond, ptr %loadaddr1, ptr %loadaddr2 %ld = load i32, ptr %sel, align 4 store i32 %ld, ptr %storeaddr, align 4 ret void } => define void @bitcasted_store(i1 %cond, ptr %loadaddr1, ptr %loadaddr2, ptr %storeaddr) { %0: %sel = select i1 %cond, ptr %loadaddr1, ptr %loadaddr2 %ld = load i32, ptr %sel, align 4 store i32 %ld, ptr %storeaddr, align 4 ret void } Transformation seems to be correct! (syntactically equal) ---------------------------------------- define void @bitcasted_minmax_with_select_of_pointers(ptr %loadaddr1, ptr %loadaddr2, ptr %storeaddr) { %0: %ld1 = load float, ptr %loadaddr1, align 4 %ld2 = load float, ptr %loadaddr2, align 4 %cond = fcmp ogt float %ld1, %ld2 %sel = select i1 %cond, ptr %loadaddr1, ptr %loadaddr2 %ld = load i32, ptr %sel, align 4 store i32 %ld, ptr %storeaddr, align 4 ret void } => define void @bitcasted_minmax_with_select_of_pointers(ptr %loadaddr1, ptr %loadaddr2, ptr %storeaddr) { %0: %ld1 = load float, ptr %loadaddr1, align 4 %ld2 = load float, ptr %loadaddr2, align 4 %cond = fcmp ogt float %ld1, %ld2 %ld.v = select i1 %cond, float %ld1, float %ld2 store float %ld.v, ptr %storeaddr, align 4 ret void } Transformation doesn't verify! (unsound) ERROR: Mismatch in memory Example: ptr %loadaddr1 = pointer(non-local, block_id=1, offset=0) ptr %loadaddr2 = pointer(non-local, block_id=2, offset=0) ptr %storeaddr = pointer(non-local, block_id=2, offset=0) Source: float %ld1 = #x00000000 (+0.0) float %ld2 = NaN i1 %cond = #x0 (0) ptr %sel = pointer(non-local, block_id=2, offset=0) i32 %ld = #xff802000 (4286586880, -8380416) SOURCE MEMORY STATE =================== NON-LOCAL BLOCKS: Block 0 > size: 0 align: 4 alloc type: 0 Block 1 > size: 13 align: 8 alloc type: 0 Block 2 > size: 9 align: 131072 alloc type: 0 Block 3 > align: 4294967296 alloc type: 0 Target: float %ld1 = #x00000000 (+0.0) float %ld2 = NaN i1 %cond = #x0 (0) float %ld.v = NaN Mismatch in pointer(non-local, block_id=2, offset=0) Source value: #xff802000 Target value: #x7fcfcfff Pass: ModuleToFunctionPassAdaptor Command line: '/home/nlopes/llvm/build/bin/opt' '-load=/home/nlopes/alive2/build/tv/tv.so' '-load-pass-plugin=/home/nlopes/alive2/build/tv/tv.so' '-tv-exit-on-error' '-passes=module(tv),function(instcombine),module(tv)' '-S' '-data-layout=e-m:e-i64:64-f80:128-n8:16:32:64-S128' '-tv-smt-to=20000' '-tv-report-dir=/home/nlopes/alive2/build/logs' '-tv-smt-stats' ------------------- SMT STATS ------------------- Num queries: 6 Num invalid: 0 Num skips: 0 Num trivial: 22 (78.6%) Num timeout: 0 (0.0%) Num errors: 0 (0.0%) Num SAT: 5 (83.3%) Num UNSAT: 1 (16.7%) Alive2: Transform doesn't verify; aborting!
+ : 'RUN: at line 2' + /home/nlopes/alive2/build/opt-alive.sh -passes=instcombine -S -data-layout=e-m:e-i64:64-f80:128-n8:16:32:64-S128 + /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/InstCombine/load-bitcast-select.ll FileCheck error: '<stdin>' is empty. FileCheck command line: /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/InstCombine/load-bitcast-select.ll