[X86][CFE] Support EGPR in GCCRegNames. (#91323)

Author: FreddyLeaf

clang/lib/Basic/Targets/X86.cpp

@@ -64,6 +64,8 @@ static const char *const GCCRegNames[] = {
     "dr0",   "dr1",   "dr2",   "dr3",   "dr6",     "dr7",
     "bnd0",  "bnd1",  "bnd2",  "bnd3",
     "tmm0",  "tmm1",  "tmm2",  "tmm3",  "tmm4",    "tmm5",  "tmm6",  "tmm7",
+    "r16",   "r17",   "r18",   "r19",   "r20",     "r21",   "r22",   "r23",
+    "r24",   "r25",   "r26",   "r27",   "r28",     "r29",   "r30",   "r31",
 };
 
 const TargetInfo::AddlRegName AddlRegNames[] = {
@@ -83,8 +85,23 @@ const TargetInfo::AddlRegName AddlRegNames[] = {
     {{"r13d", "r13w", "r13b"}, 43},
     {{"r14d", "r14w", "r14b"}, 44},
     {{"r15d", "r15w", "r15b"}, 45},
+    {{"r16d", "r16w", "r16b"}, 165},
+    {{"r17d", "r17w", "r17b"}, 166},
+    {{"r18d", "r18w", "r18b"}, 167},
+    {{"r19d", "r19w", "r19b"}, 168},
+    {{"r20d", "r20w", "r20b"}, 169},
+    {{"r21d", "r21w", "r21b"}, 170},
+    {{"r22d", "r22w", "r22b"}, 171},
+    {{"r23d", "r23w", "r23b"}, 172},
+    {{"r24d", "r24w", "r24b"}, 173},
+    {{"r25d", "r25w", "r25b"}, 174},
+    {{"r26d", "r26w", "r26b"}, 175},
+    {{"r27d", "r27w", "r27b"}, 176},
+    {{"r28d", "r28w", "r28b"}, 177},
+    {{"r29d", "r29w", "r29b"}, 178},
+    {{"r30d", "r30w", "r30b"}, 179},
+    {{"r31d", "r31w", "r31b"}, 180},
 };
-
 } // namespace targets
 } // namespace clang
 

clang/test/CodeGen/X86/inline-asm-gcc-regs.c

@@ -0,0 +1,121 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -O2 %s -o - | FileCheck %s
+
+// CHECK-LABEL: @test_r15
+// CHECK: call void asm sideeffect "", "{r15},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r15() {
+    register int a asm ("r15");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r16
+// CHECK: call void asm sideeffect "", "{r16},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r16() {
+    register int a asm ("r16");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r17
+// CHECK: call void asm sideeffect "", "{r17},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r17() {
+    register int a asm ("r17");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r18
+// CHECK: call void asm sideeffect "", "{r18},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r18() {
+    register int a asm ("r18");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r19
+// CHECK: call void asm sideeffect "", "{r19},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r19() {
+    register int a asm ("r19");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r20
+// CHECK: call void asm sideeffect "", "{r20},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r20() {
+    register int a asm ("r20");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r21
+// CHECK: call void asm sideeffect "", "{r21},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r21() {
+    register int a asm ("r21");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r22
+// CHECK: call void asm sideeffect "", "{r22},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r22() {
+    register int a asm ("r22");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r23
+// CHECK: call void asm sideeffect "", "{r23},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r23() {
+    register int a asm ("r23");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r24
+// CHECK: call void asm sideeffect "", "{r24},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r24() {
+    register int a asm ("r24");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r25
+// CHECK: call void asm sideeffect "", "{r25},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r25() {
+    register int a asm ("r25");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r26
+// CHECK: call void asm sideeffect "", "{r26},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r26() {
+    register int a asm ("r26");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r27
+// CHECK: call void asm sideeffect "", "{r27},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r27() {
+    register int a asm ("r27");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r28
+// CHECK: call void asm sideeffect "", "{r28},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r28() {
+    register int a asm ("r28");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r29
+// CHECK: call void asm sideeffect "", "{r29},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r29() {
+    register int a asm ("r29");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r30
+// CHECK: call void asm sideeffect "", "{r30},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r30() {
+    register int a asm ("r30");
+    asm ("" :: "r" (a));
+}
+
+// CHECK-LABEL: @test_r31
+// CHECK: call void asm sideeffect "", "{r31},~{dirflag},~{fpsr},~{flags}"(i32 undef)
+void test_r31() {
+    register int a asm ("r31");
+    asm ("" :: "r" (a));
+}
+