[infra] Remove IA32 from dartfuzz, GCC and MSVC testing.

Bug: #49969
Cq-Include-Trybots: luci.dart.try:vm-gcc-linux-try,vm-msvc-windows-try
Change-Id: Idf24c48fee5fc5bb757b49bd8941573822496090
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/429223
Commit-Queue: Ryan Macnak <[email protected]>
Reviewed-by: Alexander Markov <[email protected]>

Author: rmacnak-google

runtime/tools/dartfuzz/README.md

@@ -59,7 +59,7 @@ where
     --dart-top         : sets DART_TOP explicitly through command line
     --mode1            : m1
     --mode2            : m2, and values one of
-        jit-[debug-][ia32|x64|arm32|arm64]               = Dart JIT
+        jit-[debug-][x64|arm32|arm64]                    = Dart JIT
         aot-[debug-][x64|arm32|arm64]                    = Dart AOT
         djs-x64                                          = dart2js + Node.JS
     --[no-]rerun       : re-run a testcase if there is only a divergence in
@@ -71,8 +71,8 @@ If no modes are given, a random combination is used.
 
 This fuzz testing tool must have access to the top of a Dart SDK
 development tree (DART_TOP) in which all proper binaries have been
-built already (for example, testing jit-ia32 will invoke the binary
-${DART_TOP}/out/ReleaseIA32/dart to start the Dart VM). The DART_TOP
+built already (for example, testing jit-x64 will invoke the binary
+${DART_TOP}/out/ReleaseX64/dart to start the Dart VM). The DART_TOP
 can be provided through the --dart-top option, as an environment
 variable, or, by default, as the current directory by invoking the
 fuzz testing tool from the Dart SDK top.

runtime/tools/dartfuzz/dartfuzz_test.dart

@@ -122,15 +122,13 @@ abstract class TestRunner {
 
   // Convert mode to tag.
   static String getTag(String mode) {
-    if (mode.endsWith('debug-ia32')) return 'DebugIA32';
     if (mode.endsWith('debug-x64')) return 'DebugX64';
     if (mode.endsWith('debug-x64c')) return 'DebugX64C';
     if (mode.endsWith('debug-arm32')) return 'DebugSIMARM';
     if (mode.endsWith('debug-arm64')) return 'DebugSIMARM64';
     if (mode.endsWith('debug-arm64c')) return 'DebugSIMARM64C';
     if (mode.endsWith('debug-riscv32')) return 'DebugSIMRISCV32';
     if (mode.endsWith('debug-riscv64')) return 'DebugSIMRISCV64';
-    if (mode.endsWith('ia32')) return 'ReleaseIA32';
     if (mode.endsWith('x64')) return 'ReleaseX64';
     if (mode.endsWith('x64c')) return 'ReleaseX64C';
     if (mode.endsWith('arm32')) return 'ReleaseSIMARM';
@@ -745,15 +743,13 @@ class DartFuzzTestSession {
 
   // Modes used on cluster runs.
   static const List<String> clusterModes = [
-    'jit-debug-ia32',
     'jit-debug-x64',
     'jit-debug-x64c',
     'jit-debug-arm32',
     'jit-debug-arm64',
     'jit-debug-arm64c',
     'jit-debug-riscv32',
     'jit-debug-riscv64',
-    'jit-ia32',
     'jit-x64',
     'jit-x64c',
     'jit-arm32',

tools/bots/test_matrix.json

@@ -87,7 +87,6 @@
     ],
     "front-end": [
       ".dart_tool/package_config.json",
-      "out/ReleaseIA32/",
       "out/ReleaseX64/",
       "pkg/",
       "runtime/tests/",
@@ -114,7 +113,6 @@
       "third_party/pkg/",
       "third_party/requirejs/",
       "tools/",
-      "xcodebuild/ReleaseIA32/",
       "xcodebuild/ReleaseX64/"
     ],
     "fuzzer": [
@@ -1478,16 +1476,6 @@
         "description": "This configuration builds the VM with GCC."
       },
       "steps": [
-        {
-          "name": "build dart debug ia32",
-          "script": "tools/build.py",
-          "arguments": [
-            "--mode=debug",
-            "--arch=ia32",
-            "--no-clang",
-            "runtime"
-          ]
-        },
         {
           "name": "build dart debug x64",
           "script": "tools/build.py",
@@ -1521,16 +1509,6 @@
             "runtime_precompiled"
           ]
         },
-        {
-          "name": "build dart release ia32",
-          "script": "tools/build.py",
-          "arguments": [
-            "--mode=release",
-            "--arch=ia32",
-            "--no-clang",
-            "runtime"
-          ]
-        },
         {
           "name": "build dart release x64",
           "script": "tools/build.py",
@@ -3516,15 +3494,6 @@
             "dartaotruntime"
           ]
         },
-        {
-          "name": "build dart (ia32)",
-          "script": "tools/build.py",
-          "arguments": [
-            "--mode=debug,release",
-            "--arch=ia32",
-            "runtime"
-          ]
-        },
         {
           "name": "build dart (arm)",
           "script": "tools/build.py",