[RISCV] Make Zcf and Zcd imply the F and D extensions respectively

This was an omission in the spec that has now been addressed
riscvarchive/riscv-code-size-reduction#224.

Differential Revision: https://reviews.llvm.org/D156314

Author: asb

llvm/lib/Support/RISCVISAInfo.cpp

@@ -956,9 +956,9 @@ static const char *ImpliedExtsXTHeadVdot[] = {"v"};
 static const char *ImpliedExtsXsfvcp[] = {"zve32x"};
 static const char *ImpliedExtsZacas[] = {"a"};
 static const char *ImpliedExtsZcb[] = {"zca"};
-static const char *ImpliedExtsZcd[] = {"zca"};
+static const char *ImpliedExtsZcd[] = {"d", "zca"};
 static const char *ImpliedExtsZce[] = {"zcb", "zcmp", "zcmt"};
-static const char *ImpliedExtsZcf[] = {"zca"};
+static const char *ImpliedExtsZcf[] = {"f", "zca"};
 static const char *ImpliedExtsZcmp[] = {"zca"};
 static const char *ImpliedExtsZcmt[] = {"zca"};
 static const char *ImpliedExtsZdinx[] = {"zfinx"};

llvm/test/CodeGen/RISCV/attributes.ll

@@ -231,8 +231,8 @@
 ; RV32XTHEADSYNC: .attribute 5, "rv32i2p1_xtheadsync1p0"
 ; RV32ZCA: .attribute 5, "rv32i2p1_zca1p0"
 ; RV32ZCB: .attribute 5, "rv32i2p1_zca1p0_zcb1p0"
-; RV32ZCD: .attribute 5, "rv32i2p1_zca1p0_zcd1p0"
-; RV32ZCF: .attribute 5, "rv32i2p1_zca1p0_zcf1p0"
+; RV32ZCD: .attribute 5, "rv32i2p1_f2p2_d2p2_zicsr2p0_zca1p0_zcd1p0"
+; RV32ZCF: .attribute 5, "rv32i2p1_f2p2_zicsr2p0_zca1p0_zcf1p0"
 ; RV32ZCMP: .attribute 5, "rv32i2p1_zca1p0_zcmp1p0"
 ; RV32ZCMT: .attribute 5, "rv32i2p1_zicsr2p0_zca1p0_zcmt1p0"
 ; RV32ZICSR: .attribute 5, "rv32i2p1_zicsr2p0"
@@ -319,7 +319,7 @@
 ; RV64ZTSO: .attribute 5, "rv64i2p1_ztso0p1"
 ; RV64ZCA: .attribute 5, "rv64i2p1_zca1p0"
 ; RV64ZCB: .attribute 5, "rv64i2p1_zca1p0_zcb1p0"
-; RV64ZCD: .attribute 5, "rv64i2p1_zca1p0_zcd1p0"
+; RV64ZCD: .attribute 5, "rv64i2p1_f2p2_d2p2_zicsr2p0_zca1p0_zcd1p0"
 ; RV64ZCMP: .attribute 5, "rv64i2p1_zca1p0_zcmp1p0"
 ; RV64ZCMT: .attribute 5, "rv64i2p1_zicsr2p0_zca1p0_zcmt1p0"
 ; RV64ZICSR: .attribute 5, "rv64i2p1_zicsr2p0"

llvm/test/MC/RISCV/attribute-arch.s

@@ -229,10 +229,10 @@
 # CHECK: attribute      5, "rv32i2p1_zca1p0"
 
 .attribute arch, "rv32izcd1p0"
-# CHECK: attribute      5, "rv32i2p1_zca1p0_zcd1p0"
+# CHECK: attribute      5, "rv32i2p1_f2p2_d2p2_zicsr2p0_zca1p0_zcd1p0"
 
 .attribute arch, "rv32izcf1p0"
-# CHECK: attribute      5, "rv32i2p1_zca1p0_zcf1p0"
+# CHECK: attribute      5, "rv32i2p1_f2p2_zicsr2p0_zca1p0_zcf1p0"
 
 .attribute arch, "rv32izcb1p0"
 # CHECK: attribute      5, "rv32i2p1_zca1p0_zcb1p0"