[llvm] [RISCV] Make zfh imply zfhmin. (PR #75576)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-mc

@llvm/pr-subscribers-llvm-support

Author: Yeting Kuo (yetingk)

<details>
<summary>Changes</summary>

According to spec, the Zfhmin extension is a subset of the Zfh extension.

---
Full diff: https://github.com/llvm/llvm-project/pull/75576.diff


3 Files Affected:

- (modified) llvm/lib/Support/RISCVISAInfo.cpp (+1-1) 
- (modified) llvm/test/CodeGen/RISCV/attributes.ll (+4-4) 
- (modified) llvm/test/MC/RISCV/attribute-arch.s (+1-1) 


``````````diff
diff --git a/llvm/lib/Support/RISCVISAInfo.cpp b/llvm/lib/Support/RISCVISAInfo.cpp
index aad7ab8361af96..bbbaf26a7bd493 100644
--- a/llvm/lib/Support/RISCVISAInfo.cpp
+++ b/llvm/lib/Support/RISCVISAInfo.cpp
@@ -1010,7 +1010,7 @@ static const char *ImpliedExtsZcmt[] = {"zca"};
 static const char *ImpliedExtsZdinx[] = {"zfinx"};
 static const char *ImpliedExtsZfa[] = {"f"};
 static const char *ImpliedExtsZfbfmin[] = {"f"};
-static const char *ImpliedExtsZfh[] = {"f"};
+static const char *ImpliedExtsZfh[] = {"zfhmin"};
 static const char *ImpliedExtsZfhmin[] = {"f"};
 static const char *ImpliedExtsZfinx[] = {"zicsr"};
 static const char *ImpliedExtsZhinx[] = {"zfinx"};
diff --git a/llvm/test/CodeGen/RISCV/attributes.ll b/llvm/test/CodeGen/RISCV/attributes.ll
index b34ccb3ff0f937..b3d4dc8bb638a8 100644
--- a/llvm/test/CodeGen/RISCV/attributes.ll
+++ b/llvm/test/CodeGen/RISCV/attributes.ll
@@ -193,14 +193,14 @@
 ; RV32ZIHINTPAUSE: .attribute 5, "rv32i2p1_zihintpause2p0"
 ; RV32ZIHINTNTL: .attribute 5, "rv32i2p1_zihintntl1p0"
 ; RV32ZFHMIN: .attribute 5, "rv32i2p1_f2p2_zicsr2p0_zfhmin1p0"
-; RV32ZFH: .attribute 5, "rv32i2p1_f2p2_zicsr2p0_zfh1p0"
+; RV32ZFH: .attribute 5, "rv32i2p1_f2p2_zicsr2p0_zfh1p0_zfhmin1p0"
 ; RV32ZBA: .attribute 5, "rv32i2p1_zba1p0"
 ; RV32ZBB: .attribute 5, "rv32i2p1_zbb1p0"
 ; RV32ZBC: .attribute 5, "rv32i2p1_zbc1p0"
 ; RV32ZBS: .attribute 5, "rv32i2p1_zbs1p0"
 ; RV32V: .attribute 5, "rv32i2p1_f2p2_d2p2_v1p0_zicsr2p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl128b1p0_zvl32b1p0_zvl64b1p0"
 ; RV32H: .attribute 5, "rv32i2p1_h1p0"
-; RV32COMBINED: .attribute 5, "rv32i2p1_f2p2_d2p2_v1p0_zicsr2p0_zfh1p0_zbb1p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl128b1p0_zvl32b1p0_zvl64b1p0"
+; RV32COMBINED: .attribute 5, "rv32i2p1_f2p2_d2p2_v1p0_zicsr2p0_zfh1p0_zfhmin1p0_zbb1p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl128b1p0_zvl32b1p0_zvl64b1p0"
 ; RV32ZBKB: .attribute 5, "rv32i2p1_zbkb1p0"
 ; RV32ZBKC: .attribute 5, "rv32i2p1_zbkc1p0"
 ; RV32ZBKX: .attribute 5, "rv32i2p1_zbkx1p0"
@@ -283,14 +283,14 @@
 ; RV64ZIHINTPAUSE: .attribute 5, "rv64i2p1_zihintpause2p0"
 ; RV64ZIHINTNTL: .attribute 5, "rv64i2p1_zihintntl1p0"
 ; RV64ZFHMIN: .attribute 5, "rv64i2p1_f2p2_zicsr2p0_zfhmin1p0"
-; RV64ZFH: .attribute 5, "rv64i2p1_f2p2_zicsr2p0_zfh1p0"
+; RV64ZFH: .attribute 5, "rv64i2p1_f2p2_zicsr2p0_zfh1p0_zfhmin1p0"
 ; RV64ZBA: .attribute 5, "rv64i2p1_zba1p0"
 ; RV64ZBB: .attribute 5, "rv64i2p1_zbb1p0"
 ; RV64ZBC: .attribute 5, "rv64i2p1_zbc1p0"
 ; RV64ZBS: .attribute 5, "rv64i2p1_zbs1p0"
 ; RV64V: .attribute 5, "rv64i2p1_f2p2_d2p2_v1p0_zicsr2p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl128b1p0_zvl32b1p0_zvl64b1p0"
 ; RV64H: .attribute 5, "rv64i2p1_h1p0"
-; RV64COMBINED: .attribute 5, "rv64i2p1_f2p2_d2p2_v1p0_zicsr2p0_zfh1p0_zbb1p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl128b1p0_zvl32b1p0_zvl64b1p0"
+; RV64COMBINED: .attribute 5, "rv64i2p1_f2p2_d2p2_v1p0_zicsr2p0_zfh1p0_zfhmin1p0_zbb1p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl128b1p0_zvl32b1p0_zvl64b1p0"
 ; RV64ZBKB: .attribute 5, "rv64i2p1_zbkb1p0"
 ; RV64ZBKC: .attribute 5, "rv64i2p1_zbkc1p0"
 ; RV64ZBKX: .attribute 5, "rv64i2p1_zbkx1p0"
diff --git a/llvm/test/MC/RISCV/attribute-arch.s b/llvm/test/MC/RISCV/attribute-arch.s
index 3ed48401e43fc8..25f84f3cc1232b 100644
--- a/llvm/test/MC/RISCV/attribute-arch.s
+++ b/llvm/test/MC/RISCV/attribute-arch.s
@@ -166,7 +166,7 @@
 # CHECK: attribute      5, "rv32i2p1_f2p2_zicsr2p0_zfhmin1p0"
 
 .attribute arch, "rv32ifzfh1p0"
-# CHECK: attribute      5, "rv32i2p1_f2p2_zicsr2p0_zfh1p0"
+# CHECK: attribute      5, "rv32i2p1_f2p2_zicsr2p0_zfh1p0_zfhmin1p0"
 
 .attribute arch, "rv32izfinx"
 # CHECK: attribute      5, "rv32i2p1_zicsr2p0_zfinx1p0"

``````````

</details>


https://github.com/llvm/llvm-project/pull/75576