[clang] [CIR][X86]Implement handling for shiftleft/shiftright builtins in CIR (PR #175049)

[Priyanshu Kumar via cfe-commits]

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@@ -0,0 +1,60 @@
+// RUN: %clang_cc1 -ffreestanding -fms-extensions -triple x86_64-unknown-linux-gnu \
+// RUN:         -Oz -fclangir -emit-cir %s -o %t.cir
+// RUN: FileCheck --input-file=%t.cir %s -check-prefix=CIR
+
+// RUN: %clang_cc1 -ffreestanding -fms-extensions -triple x86_64-unknown-linux-gnu \
+// RUN:         -Oz -fclangir -emit-llvm %s -o %t.ll
+// RUN: FileCheck --input-file=%t.ll %s -check-prefix=LLVM
+
+// RUN: %clang_cc1 -ffreestanding -fms-extensions -triple x86_64-unknown-linux-gnu \
+// RUN:         -Oz -emit-llvm %s -o %t.ll
+// RUN: FileCheck --input-file=%t.ll %s -check-prefix=OGCG
+
+unsigned __int64 __shiftleft128(unsigned __int64 low, unsigned __int64 high,
+                                unsigned char shift);
+unsigned __int64 __shiftright128(unsigned __int64 low, unsigned __int64 high,
+                                 unsigned char shift);
+
+unsigned __int64 test_shiftleft128(unsigned __int64 l, unsigned __int64 h,
+                                   unsigned char d) {
+                                     // CIR-LABEL: cir.func{{.*}}@test_shiftleft128
+                                     // CIR: (%[[L:[^,]+]]: !u64i{{.*}}, %[[H:[^,]+]]: !u64i{{.*}}, %[[D:[^,]+]]: !u8i{{.*}})
+                                     // CIR: %[[D_LOAD:[^ ]+]] = cir.load {{.*}} %{{[^ ]+}} : !cir.ptr<!u8i>, !u8i
+                                     // CIR: %[[D_CAST:[^ ]+]] = cir.cast integral %[[D_LOAD]] : !u8i -> !u64i
+                                     // CIR: %{{[^ ]+}} = cir.call_llvm_intrinsic "fshl" {{.*}} : (!u64i, !u64i, !u64i) -> !u64i
+// CIR: cir.return
+
+// LLVM-LABEL: define dso_local i64 @test_shiftleft128(i64 %0, i64 %1, i8 %2)
+// LLVM-NEXT: [[TMP1:%.*]] = zext i8 %2 to i64
+// LLVM-NEXT: [[TMP2:%.*]] = tail call i64 @llvm.fshl.i64(i64 %1, i64 %0, i64 [[TMP1]])
+// LLVM-NEXT: ret i64 [[TMP2]]
+
+// OGCG-LABEL: define dso_local noundef i64 @test_shiftleft128(i64 noundef %l, i64 noundef %h, i8 noundef zeroext %d)
+// OGCG-NEXT: entry:
+// OGCG-NEXT: [[TMP0:%.*]] = zext i8 %d to i64
+// OGCG-NEXT: [[TMP1:%.*]] = tail call i64 @llvm.fshl.i64(i64 %h, i64 %l, i64 [[TMP0]])
+// OGCG-NEXT: ret i64 [[TMP1]]
+return __shiftleft128(l, h, d);
+}
+
+unsigned __int64 test_shiftright128(unsigned __int64 l, unsigned __int64 h,
+                                    unsigned char d) {
+                                      // CIR-LABEL: cir.func{{.*}}@test_shiftright128
+                                      // CIR: (%[[L:[^,]+]]: !u64i{{.*}}, %[[H:[^,]+]]: !u64i{{.*}}, %[[D:[^,]+]]: !u8i{{.*}})
+// CIR: %[[D_LOAD:[^ ]+]] = cir.load {{.*}} %{{[^ ]+}} : !cir.ptr<!u8i>, !u8i
+// CIR: %[[D_CAST:[^ ]+]] = cir.cast integral %[[D_LOAD]] : !u8i -> !u64i
+// CIR: %{{[^ ]+}} = cir.call_llvm_intrinsic "fshr" {{.*}} : (!u64i, !u64i, !u64i) -> !u64i
+// CIR: cir.return
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Priyanshu3820 wrote:

it happened after running clang-format. Seems like it aligned those lines with the function signature's indentation

https://github.com/llvm/llvm-project/pull/175049