[PATCH] D114581: [RISCV] Fix a crash in decoding LMUL in VTYPE
Ben Shi via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Nov 29 20:15:52 PST 2021
benshi001 updated this revision to Diff 390559.
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D114581/new/
https://reviews.llvm.org/D114581
Files:
llvm/lib/Target/RISCV/MCTargetDesc/RISCVInstPrinter.cpp
llvm/test/MC/RISCV/rvv/vsetvl-invalid.s
Index: llvm/test/MC/RISCV/rvv/vsetvl-invalid.s
===================================================================
--- /dev/null
+++ llvm/test/MC/RISCV/rvv/vsetvl-invalid.s
@@ -0,0 +1,28 @@
+# RUN: llvm-mc -filetype=obj -triple=riscv32 %s \
+# RUN: | llvm-objdump -d --mattr=+experimental-v - | FileCheck %s
+# RUN: llvm-mc -filetype=obj -triple=riscv64 %s \
+# RUN: | llvm-objdump -d --mattr=+experimental-v - | FileCheck %s
+
+# CHECK: vsetvli a1, a0, e64, m1, tu, mu
+.word 0x018575d7
+
+# CHECK: vsetvli a1, a0, 28
+.word 0x01c575d7
+
+# CHECK: vsetvli a1, a0, 36
+.word 0x024575d7
+
+# CHECK: vsetvli a1, a0, e64, mf8, tu, mu
+.word 0x01d575d7
+
+# CHECK: vsetivli a1, 16, e8, m4, tu, mu
+.word 0xc02875d7
+
+# CHECK: vsetivli a1, 16, 12
+.word 0xc0c875d7
+
+# CHECK: vsetivli a1, 16, 52
+.word 0xc34875d7
+
+# CHECK: vsetivli a1, 16, e8, mf4, tu, mu
+.word 0xc06875d7
Index: llvm/lib/Target/RISCV/MCTargetDesc/RISCVInstPrinter.cpp
===================================================================
--- llvm/lib/Target/RISCV/MCTargetDesc/RISCVInstPrinter.cpp
+++ llvm/lib/Target/RISCV/MCTargetDesc/RISCVInstPrinter.cpp
@@ -170,6 +170,12 @@
void RISCVInstPrinter::printVTypeI(const MCInst *MI, unsigned OpNo,
const MCSubtargetInfo &STI, raw_ostream &O) {
unsigned Imm = MI->getOperand(OpNo).getImm();
+ // The encoding vlmul[2:0]=4 is reserved, so we just print the immediate.
+ if ((Imm & 7) == 4) {
+ O << Imm;
+ return;
+ }
+ // Print the text form.
RISCVVType::printVType(Imm, O);
}
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