[clang] 29bb877 - [PowerPC] Fix lharx and lbarx builtin signatures

[Albion Fung via cfe-commits]

Author: Albion Fung
Date: 2021-09-30T22:36:13-05:00
New Revision: 29bb877499ce328f8f4a5d61e9bae94e5f97f908

URL: https://github.com/llvm/llvm-project/commit/29bb877499ce328f8f4a5d61e9bae94e5f97f908
DIFF: https://github.com/llvm/llvm-project/commit/29bb877499ce328f8f4a5d61e9bae94e5f97f908.diff

LOG: [PowerPC] Fix lharx and lbarx builtin signatures

The signatures for the PowerPC builtins lharx and
lbarx are incorrect, and causes issues when used in a function
that requires the return of the builtin to be promoted.
This patch fixes these signatures.

Differential revision: https://reviews.llvm.org/D110273

Added: 
    

Modified: 
    clang/include/clang/Basic/BuiltinsPPC.def
    clang/test/CodeGen/builtins-ppc-xlcompat-LoadReseve-StoreCond.c

Removed: 
    


################################################################################
diff  --git a/clang/include/clang/Basic/BuiltinsPPC.def b/clang/include/clang/Basic/BuiltinsPPC.def
index 26286c270905e..65f490a214bcb 100644
--- a/clang/include/clang/Basic/BuiltinsPPC.def
+++ b/clang/include/clang/Basic/BuiltinsPPC.def
@@ -74,8 +74,8 @@ BUILTIN(__builtin_ppc_fetch_and_swap, "UiUiD*Ui", "")
 BUILTIN(__builtin_ppc_fetch_and_swaplp, "ULiULiD*ULi", "")
 BUILTIN(__builtin_ppc_ldarx, "LiLiD*", "")
 BUILTIN(__builtin_ppc_lwarx, "iiD*", "")
-BUILTIN(__builtin_ppc_lharx, "isD*", "")
-BUILTIN(__builtin_ppc_lbarx, "UiUcD*", "")
+BUILTIN(__builtin_ppc_lharx, "ssD*", "")
+BUILTIN(__builtin_ppc_lbarx, "ccD*", "")
 BUILTIN(__builtin_ppc_stdcx, "iLiD*Li", "")
 BUILTIN(__builtin_ppc_stwcx, "iiD*i", "")
 BUILTIN(__builtin_ppc_sthcx, "isD*s", "")

diff  --git a/clang/test/CodeGen/builtins-ppc-xlcompat-LoadReseve-StoreCond.c b/clang/test/CodeGen/builtins-ppc-xlcompat-LoadReseve-StoreCond.c
index 7c898f523dc85..0362ae389ba06 100644
--- a/clang/test/CodeGen/builtins-ppc-xlcompat-LoadReseve-StoreCond.c
+++ b/clang/test/CodeGen/builtins-ppc-xlcompat-LoadReseve-StoreCond.c
@@ -24,7 +24,7 @@ short test_lharx(volatile short *a) {
   return __lharx(a);
 }
 
-char test_lbarx(volatile unsigned char *a) {
+char test_lbarx(volatile char *a) {
   // CHECK-LABEL: @test_lbarx
   // CHECK: %0 = tail call i8 asm sideeffect "lbarx $0, ${1:y}", "=r,*Z,~{memory}"(i8* %a)
   // CHECK-NON-PWR8-ERR:  error: this builtin is only valid on POWER8 or later CPUs
@@ -46,3 +46,18 @@ int test_sthcx(volatile short *a, short val) {
   // CHECK-NON-PWR8-ERR:  error: this builtin is only valid on POWER8 or later CPUs
   return __sthcx(a, val);
 }
+
+// Extra test cases that previously caused error during usage.
+int test_lharx_intret(volatile short *a) {
+  // CHECK-LABEL: @test_lharx_intret
+  // CHECK: %0 = tail call i16 asm sideeffect "lharx $0, ${1:y}", "=r,*Z,~{memory}"(i16* %a)
+  // CHECK-NON-PWR8-ERR:  error: this builtin is only valid on POWER8 or later CPUs
+  return __lharx(a);
+}
+
+int test_lbarx_intret(volatile char *a) {
+  // CHECK-LABEL: @test_lbarx_intret
+  // CHECK: %0 = tail call i8 asm sideeffect "lbarx $0, ${1:y}", "=r,*Z,~{memory}"(i8* %a)
+  // CHECK-NON-PWR8-ERR:  error: this builtin is only valid on POWER8 or later CPUs
+  return __lbarx(a);
+}