[llvm] [MachineVerifier] Report errors from one thread at a time (PR #111605)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,55 @@
+# RUN: not --crash llc -march=x86-64 -run-pass none -o /dev/null %s 2>&1 | FileCheck %s
+# This test ensures that the address is checked in machine verifier.
+
+---
+name:            baz
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    successors: %bb.1(0x80000000)
+    liveins: $rdi, $xmm0
+
+    %1:vr128 = COPY $xmm0
+    %0:gr64 = COPY $rdi
+    %2:vr128 = COPY %1
+
+  bb.1:
+    successors: %bb.1(0x80000000)
+
+    %3:vr256 = AVX_SET0
+    %4:vr128 = VPSLLDri %2, 31
+    %5:vr256 = VPMOVSXDQYrr killed %4
+    %8:vr256 = IMPLICIT_DEF
+    %6:vr256, %7:vr256 = VGATHERQPDYrm %3, %0, 16, killed %8, 0, $noreg, %5 :: (load unknown-size, align 8)
+    %9:vr128 = COPY %6.sub_xmm
+    VMOVLPDmr $noreg, 1, $noreg, 1111111111111, $noreg, killed %9 :: (store (s64) into `ptr undef`)
+    JMP_1 %bb.1
+
+...
+---
+name:            bar
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    successors: %bb.1(0x80000000)
+    liveins: $rdi, $xmm0
+
+    %1:vr128 = COPY $xmm0
+    %0:gr64 = COPY $rdi
+    %2:vr128 = COPY %1
+
+  bb.1:
+    successors: %bb.1(0x80000000)
+
+    %3:vr256 = AVX_SET0
+    %4:vr128 = VPSLLDri %2, 31
+    %5:vr256 = VPMOVSXDQYrr killed %4
+    %8:vr256 = IMPLICIT_DEF
+    %6:vr256, %7:vr256 = VGATHERQPDYrm %3, %0, 16, killed %8, 0, $noreg, %5 :: (load unknown-size, align 8)
+    %9:vr128 = COPY %6.sub_xmm
+    VMOVLPDmr $noreg, 1, $noreg, 1111111111111, $noreg, killed %9 :: (store (s64) into `ptr undef`)
+    JMP_1 %bb.1
+
+...
+
+; CHECK: LLVM ERROR: Found 2 machine code errors
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arsenm wrote:

Check the error messages too? 

https://github.com/llvm/llvm-project/pull/111605