Test source: git
Source: <stdin>
-- 1. ModuleToFunctionPassAdaptor
-- 1. PassManager<Function> : Skipping NOP
-- 2. GVNPass
----------------------------------------
define <4 x float> @ConvertVectors_ByRef(ptr %loc) {
#0:
%load_vec = load <4 x float>, ptr %loc, align 16
%shuf = shufflevector <4 x float> %load_vec, <4 x float> poison, 0, 4294967295, 4294967295, 4294967295
%gep1 = gep inbounds ptr %loc, 16 x i64 0, 4 x i64 1
%load1 = load float, ptr %gep1, align 4
%ins1 = insertelement <4 x float> %shuf, float %load1, i64 1
%gep2 = gep inbounds ptr %loc, 16 x i64 0, 4 x i64 2
%load2 = load float, ptr %gep2, align 8
%ins2 = insertelement <4 x float> %ins1, float %load2, i64 2
%ins3 = insertelement <4 x float> %ins2, float %load2, i64 3
ret <4 x float> %ins3
}
Transformation seems to be correct! (syntactically equal)
-- 3. GVNPass
----------------------------------------
define <4 x float> @ConvertVectors_ByRef(ptr %loc) {
#0:
%load_vec = load <4 x float>, ptr %loc, align 16
%shuf = shufflevector <4 x float> %load_vec, <4 x float> poison, 0, 4294967295, 4294967295, 4294967295
%gep1 = gep inbounds ptr %loc, 16 x i64 0, 4 x i64 1
%load1 = load float, ptr %gep1, align 4
%ins1 = insertelement <4 x float> %shuf, float %load1, i64 1
%gep2 = gep inbounds ptr %loc, 16 x i64 0, 4 x i64 2
%load2 = load float, ptr %gep2, align 8
%ins2 = insertelement <4 x float> %ins1, float %load2, i64 2
%ins3 = insertelement <4 x float> %ins2, float %load2, i64 3
ret <4 x float> %ins3
}
=>
define <4 x float> @ConvertVectors_ByRef(ptr %loc) {
#0:
%load_vec = load <4 x float>, ptr %loc, align 16
%shuf = shufflevector <4 x float> %load_vec, <4 x float> poison, 0, 4294967295, 4294967295, 4294967295
%#1 = bitcast <4 x float> %load_vec to i128
%#2 = lshr i128 %#1, 32
%#3 = trunc i128 %#2 to i32
%#4 = bitcast i32 %#3 to float
%ins1 = insertelement <4 x float> %shuf, float %#4, i64 1
%#5 = lshr i128 %#1, 64
%#6 = trunc i128 %#5 to i32
%#7 = bitcast i32 %#6 to float
%ins2 = insertelement <4 x float> %ins1, float %#7, i64 2
%ins3 = insertelement <4 x float> %ins2, float %#7, i64 3
ret <4 x float> %ins3
}
Transformation doesn't verify! (unsound)
ERROR: Target is more poisonous than source
Example:
ptr %loc = pointer(non-local, block_id=1, offset=0) / Address=#x10
Source:
<4 x float> %load_vec = < poison, #x00000000 (+0.0), #x00000000 (+0.0), poison >
<4 x float> %shuf = < poison, poison, poison, poison >
ptr %gep1 = pointer(non-local, block_id=1, offset=4) / Address=#x14
float %load1 = #x00000000 (+0.0)
<4 x float> %ins1 = < poison, #x00000000 (+0.0), poison, poison >
ptr %gep2 = pointer(non-local, block_id=1, offset=8) / Address=#x18
float %load2 = #x00000000 (+0.0)
<4 x float> %ins2 = < poison, #x00000000 (+0.0), #x00000000 (+0.0), poison >
<4 x float> %ins3 = < poison, #x00000000 (+0.0), #x00000000 (+0.0), #x00000000 (+0.0) >
SOURCE MEMORY STATE
===================
NON-LOCAL BLOCKS:
Block 0 > size: 0 align: 4 alloc type: 0 alive: false address: 0
Block 1 > size: 32 align: 1 alloc type: 0 alive: true address: 16
Contents:
2: #x00000000
1: #x00000000
*: poison
Target:
<4 x float> %load_vec = < poison, #x00000000 (+0.0), #x00000000 (+0.0), poison >
<4 x float> %shuf = < poison, poison, poison, poison >
i128 %#1 = poison
i128 %#2 = poison
i32 %#3 = poison
float %#4 = poison
<4 x float> %ins1 = < poison, poison, poison, poison >
i128 %#5 = poison
i32 %#6 = poison
float %#7 = poison
<4 x float> %ins2 = < poison, poison, poison, poison >
<4 x float> %ins3 = < poison, poison, poison, poison >
Source value: < poison, #x00000000 (+0.0), #x00000000 (+0.0), #x00000000 (+0.0) >
Target value: < poison, poison, poison, poison >
Pass: GVNPass
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=gvn' '-S' '-tv-smt-to=20000' '-tv-report-dir=/home/nlopes/alive2/build/logs' '-tv-smt-stats'
Wrote bitcode to: "/home/nlopes/alive2/build/logs/in_gdhqLwSD_raTn.bc"
------------------- SMT STATS -------------------
Num queries: 25
Num invalid: 0
Num skips: 0
Num trivial: 19 (43.2%)
Num timeout: 0 (0.0%)
Num errors: 0 (0.0%)
Num SAT: 15 (60.0%)
Num UNSAT: 10 (40.0%)
Alive2: Transform doesn't verify; aborting!
RUN: at line 2: /home/nlopes/alive2/build/opt-alive.sh -passes=gvn -S < /bitbucket/nlopes/llvm/llvm/test/Transforms/GVN/pr63059.ll | /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/GVN/pr63059.ll + /home/nlopes/alive2/build/opt-alive.sh -passes=gvn -S + /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/GVN/pr63059.ll FileCheck error: '<stdin>' is empty. FileCheck command line: /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/GVN/pr63059.ll