[MIPS GlobalISel] Select mul

Legalize and select G_MUL for s32 and smaller types for MIPS32.

Differential Revision: https://reviews.llvm.org/D57816

llvm-svn: 353506

4 files changed, 362 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/Mips/GlobalISel/instruction-select/mul.mir b/llvm/test/CodeGen/Mips/GlobalISel/instruction-select/mul.mir
new file mode 100644
index 00000000000..507c33520a8
--- /dev/null
+++ b/llvm/test/CodeGen/Mips/GlobalISel/instruction-select/mul.mir
@@ -0,0 +1,31 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -O0 -mtriple=mipsel-linux-gnu -run-pass=instruction-select -verify-machineinstrs %s -o - | FileCheck %s -check-prefixes=MIPS32
+--- |
+
+  define void @mul_i32(i32 %x, i32 %y) {entry: ret void}
+
+...
+---
+name:            mul_i32
+alignment:       2
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+body:             |
+  bb.0.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: mul_i32
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:gpr32 = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:gpr32 = COPY $a1
+    ; MIPS32: [[MUL:%[0-9]+]]:gpr32 = MUL [[COPY]], [[COPY1]], implicit-def $hi0, implicit-def $lo0
+    ; MIPS32: $v0 = COPY [[MUL]]
+    ; MIPS32: RetRA implicit $v0
+    %0:gprb(s32) = COPY $a0
+    %1:gprb(s32) = COPY $a1
+    %2:gprb(s32) = G_MUL %0, %1
+    $v0 = COPY %2(s32)
+    RetRA implicit $v0
+
+...
diff --git a/llvm/test/CodeGen/Mips/GlobalISel/legalizer/mul.mir b/llvm/test/CodeGen/Mips/GlobalISel/legalizer/mul.mir
new file mode 100644
index 00000000000..481f8fce712
--- /dev/null
+++ b/llvm/test/CodeGen/Mips/GlobalISel/legalizer/mul.mir
@@ -0,0 +1,213 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -O0 -mtriple=mipsel-linux-gnu -run-pass=legalizer -verify-machineinstrs %s -o - | FileCheck %s -check-prefixes=MIPS32
+--- |
+
+  define void @mul_i32() {entry: ret void}
+  define void @mul_i8_sext() {entry: ret void}
+  define void @mul_i8_zext() {entry: ret void}
+  define void @mul_i8_aext() {entry: ret void}
+  define void @mul_i16_sext() {entry: ret void}
+  define void @mul_i16_zext() {entry: ret void}
+  define void @mul_i16_aext() {entry: ret void}
+
+...
+---
+name:            mul_i32
+alignment:       2
+tracksRegLiveness: true
+body:             |
+  bb.0.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: mul_i32
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:_(s32) = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:_(s32) = COPY $a1
+    ; MIPS32: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[COPY]], [[COPY1]]
+    ; MIPS32: $v0 = COPY [[MUL]](s32)
+    ; MIPS32: RetRA implicit $v0
+    %0:_(s32) = COPY $a0
+    %1:_(s32) = COPY $a1
+    %2:_(s32) = G_MUL %0, %1
+    $v0 = COPY %2(s32)
+    RetRA implicit $v0
+
+...
+---
+name:            mul_i8_sext
+alignment:       2
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: mul_i8_sext
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:_(s32) = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:_(s32) = COPY $a1
+    ; MIPS32: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; MIPS32: [[COPY3:%[0-9]+]]:_(s32) = COPY [[COPY]](s32)
+    ; MIPS32: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[COPY2]], [[COPY3]]
+    ; MIPS32: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 24
+    ; MIPS32: [[COPY4:%[0-9]+]]:_(s32) = COPY [[MUL]](s32)
+    ; MIPS32: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[COPY4]], [[C]](s32)
+    ; MIPS32: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[SHL]], [[C]](s32)
+    ; MIPS32: $v0 = COPY [[ASHR]](s32)
+    ; MIPS32: RetRA implicit $v0
+    %2:_(s32) = COPY $a0
+    %0:_(s8) = G_TRUNC %2(s32)
+    %3:_(s32) = COPY $a1
+    %1:_(s8) = G_TRUNC %3(s32)
+    %4:_(s8) = G_MUL %1, %0
+    %5:_(s32) = G_SEXT %4(s8)
+    $v0 = COPY %5(s32)
+    RetRA implicit $v0
+
+...
+---
+name:            mul_i8_zext
+alignment:       2
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: mul_i8_zext
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:_(s32) = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:_(s32) = COPY $a1
+    ; MIPS32: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; MIPS32: [[COPY3:%[0-9]+]]:_(s32) = COPY [[COPY]](s32)
+    ; MIPS32: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[COPY2]], [[COPY3]]
+    ; MIPS32: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 255
+    ; MIPS32: [[COPY4:%[0-9]+]]:_(s32) = COPY [[MUL]](s32)
+    ; MIPS32: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY4]], [[C]]
+    ; MIPS32: $v0 = COPY [[AND]](s32)
+    ; MIPS32: RetRA implicit $v0
+    %2:_(s32) = COPY $a0
+    %0:_(s8) = G_TRUNC %2(s32)
+    %3:_(s32) = COPY $a1
+    %1:_(s8) = G_TRUNC %3(s32)
+    %4:_(s8) = G_MUL %1, %0
+    %5:_(s32) = G_ZEXT %4(s8)
+    $v0 = COPY %5(s32)
+    RetRA implicit $v0
+
+...
+---
+name:            mul_i8_aext
+alignment:       2
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: mul_i8_aext
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:_(s32) = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:_(s32) = COPY $a1
+    ; MIPS32: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; MIPS32: [[COPY3:%[0-9]+]]:_(s32) = COPY [[COPY]](s32)
+    ; MIPS32: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[COPY2]], [[COPY3]]
+    ; MIPS32: [[COPY4:%[0-9]+]]:_(s32) = COPY [[MUL]](s32)
+    ; MIPS32: $v0 = COPY [[COPY4]](s32)
+    ; MIPS32: RetRA implicit $v0
+    %2:_(s32) = COPY $a0
+    %0:_(s8) = G_TRUNC %2(s32)
+    %3:_(s32) = COPY $a1
+    %1:_(s8) = G_TRUNC %3(s32)
+    %4:_(s8) = G_MUL %1, %0
+    %5:_(s32) = G_ANYEXT %4(s8)
+    $v0 = COPY %5(s32)
+    RetRA implicit $v0
+
+...
+---
+name:            mul_i16_sext
+alignment:       2
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: mul_i16_sext
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:_(s32) = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:_(s32) = COPY $a1
+    ; MIPS32: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; MIPS32: [[COPY3:%[0-9]+]]:_(s32) = COPY [[COPY]](s32)
+    ; MIPS32: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[COPY2]], [[COPY3]]
+    ; MIPS32: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; MIPS32: [[COPY4:%[0-9]+]]:_(s32) = COPY [[MUL]](s32)
+    ; MIPS32: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[COPY4]], [[C]](s32)
+    ; MIPS32: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[SHL]], [[C]](s32)
+    ; MIPS32: $v0 = COPY [[ASHR]](s32)
+    ; MIPS32: RetRA implicit $v0
+    %2:_(s32) = COPY $a0
+    %0:_(s16) = G_TRUNC %2(s32)
+    %3:_(s32) = COPY $a1
+    %1:_(s16) = G_TRUNC %3(s32)
+    %4:_(s16) = G_MUL %1, %0
+    %5:_(s32) = G_SEXT %4(s16)
+    $v0 = COPY %5(s32)
+    RetRA implicit $v0
+
+...
+---
+name:            mul_i16_zext
+alignment:       2
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: mul_i16_zext
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:_(s32) = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:_(s32) = COPY $a1
+    ; MIPS32: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; MIPS32: [[COPY3:%[0-9]+]]:_(s32) = COPY [[COPY]](s32)
+    ; MIPS32: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[COPY2]], [[COPY3]]
+    ; MIPS32: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 65535
+    ; MIPS32: [[COPY4:%[0-9]+]]:_(s32) = COPY [[MUL]](s32)
+    ; MIPS32: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY4]], [[C]]
+    ; MIPS32: $v0 = COPY [[AND]](s32)
+    ; MIPS32: RetRA implicit $v0
+    %2:_(s32) = COPY $a0
+    %0:_(s16) = G_TRUNC %2(s32)
+    %3:_(s32) = COPY $a1
+    %1:_(s16) = G_TRUNC %3(s32)
+    %4:_(s16) = G_MUL %1, %0
+    %5:_(s32) = G_ZEXT %4(s16)
+    $v0 = COPY %5(s32)
+    RetRA implicit $v0
+
+...
+---
+name:            mul_i16_aext
+alignment:       2
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: mul_i16_aext
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:_(s32) = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:_(s32) = COPY $a1
+    ; MIPS32: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; MIPS32: [[COPY3:%[0-9]+]]:_(s32) = COPY [[COPY]](s32)
+    ; MIPS32: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[COPY2]], [[COPY3]]
+    ; MIPS32: [[COPY4:%[0-9]+]]:_(s32) = COPY [[MUL]](s32)
+    ; MIPS32: $v0 = COPY [[COPY4]](s32)
+    ; MIPS32: RetRA implicit $v0
+    %2:_(s32) = COPY $a0
+    %0:_(s16) = G_TRUNC %2(s32)
+    %3:_(s32) = COPY $a1
+    %1:_(s16) = G_TRUNC %3(s32)
+    %4:_(s16) = G_MUL %1, %0
+    %5:_(s32) = G_ANYEXT %4(s16)
+    $v0 = COPY %5(s32)
+    RetRA implicit $v0
+
+...
diff --git a/llvm/test/CodeGen/Mips/GlobalISel/llvm-ir/mul.ll b/llvm/test/CodeGen/Mips/GlobalISel/llvm-ir/mul.ll
new file mode 100644
index 00000000000..11e5426ad77
--- /dev/null
+++ b/llvm/test/CodeGen/Mips/GlobalISel/llvm-ir/mul.ll
@@ -0,0 +1,88 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc  -O0 -mtriple=mipsel-linux-gnu -global-isel  -verify-machineinstrs %s -o -| FileCheck %s -check-prefixes=MIPS32
+define i32 @mul_i32(i32 %x, i32 %y) {
+; MIPS32-LABEL: mul_i32:
+; MIPS32:       # %bb.0: # %entry
+; MIPS32-NEXT:    mul $2, $4, $5
+; MIPS32-NEXT:    jr $ra
+; MIPS32-NEXT:    nop
+entry:
+  %z = mul i32 %x, %y
+  ret i32 %z
+}
+
+define signext i8 @mul_i8_sext(i8 signext %a, i8 signext %b) {
+; MIPS32-LABEL: mul_i8_sext:
+; MIPS32:       # %bb.0: # %entry
+; MIPS32-NEXT:    mul $4, $5, $4
+; MIPS32-NEXT:    sll $4, $4, 24
+; MIPS32-NEXT:    sra $2, $4, 24
+; MIPS32-NEXT:    jr $ra
+; MIPS32-NEXT:    nop
+entry:
+  %mul = mul i8 %b, %a
+  ret i8 %mul
+}
+
+define zeroext i8 @mul_i8_zext(i8 zeroext %a, i8 zeroext %b) {
+; MIPS32-LABEL: mul_i8_zext:
+; MIPS32:       # %bb.0: # %entry
+; MIPS32-NEXT:    mul $4, $5, $4
+; MIPS32-NEXT:    lui $5, 0
+; MIPS32-NEXT:    ori $5, $5, 255
+; MIPS32-NEXT:    and $2, $4, $5
+; MIPS32-NEXT:    jr $ra
+; MIPS32-NEXT:    nop
+entry:
+  %mul = mul i8 %b, %a
+  ret i8 %mul
+}
+
+define i8 @mul_i8_aext(i8 %a, i8 %b) {
+; MIPS32-LABEL: mul_i8_aext:
+; MIPS32:       # %bb.0: # %entry
+; MIPS32-NEXT:    mul $2, $5, $4
+; MIPS32-NEXT:    jr $ra
+; MIPS32-NEXT:    nop
+entry:
+  %mul = mul i8 %b, %a
+  ret i8 %mul
+}
+
+define signext i16 @mul_i16_sext(i16 signext %a, i16 signext %b) {
+; MIPS32-LABEL: mul_i16_sext:
+; MIPS32:       # %bb.0: # %entry
+; MIPS32-NEXT:    mul $4, $5, $4
+; MIPS32-NEXT:    sll $4, $4, 16
+; MIPS32-NEXT:    sra $2, $4, 16
+; MIPS32-NEXT:    jr $ra
+; MIPS32-NEXT:    nop
+entry:
+  %mul = mul i16 %b, %a
+  ret i16 %mul
+}
+
+define zeroext i16 @mul_i16_zext(i16 zeroext %a, i16 zeroext %b) {
+; MIPS32-LABEL: mul_i16_zext:
+; MIPS32:       # %bb.0: # %entry
+; MIPS32-NEXT:    mul $4, $5, $4
+; MIPS32-NEXT:    lui $5, 0
+; MIPS32-NEXT:    ori $5, $5, 65535
+; MIPS32-NEXT:    and $2, $4, $5
+; MIPS32-NEXT:    jr $ra
+; MIPS32-NEXT:    nop
+entry:
+  %mul = mul i16 %b, %a
+  ret i16 %mul
+}
+
+define i16 @mul_i16_aext(i16 %a, i16 %b) {
+; MIPS32-LABEL: mul_i16_aext:
+; MIPS32:       # %bb.0: # %entry
+; MIPS32-NEXT:    mul $2, $5, $4
+; MIPS32-NEXT:    jr $ra
+; MIPS32-NEXT:    nop
+entry:
+  %mul = mul i16 %b, %a
+  ret i16 %mul
+}
diff --git a/llvm/test/CodeGen/Mips/GlobalISel/regbankselect/mul.mir b/llvm/test/CodeGen/Mips/GlobalISel/regbankselect/mul.mir
new file mode 100644
index 00000000000..18ed66020dd
--- /dev/null
+++ b/llvm/test/CodeGen/Mips/GlobalISel/regbankselect/mul.mir
@@ -0,0 +1,30 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -O0 -mtriple=mipsel-linux-gnu -run-pass=regbankselect -verify-machineinstrs %s -o - | FileCheck %s -check-prefixes=MIPS32
+--- |
+
+  define void @mul_i32(i32 %x, i32 %y) {entry: ret void}
+
+...
+---
+name:            mul_i32
+alignment:       2
+legalized:       true
+tracksRegLiveness: true
+body:             |
+  bb.0.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: mul_i32
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:gprb(s32) = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:gprb(s32) = COPY $a1
+    ; MIPS32: [[MUL:%[0-9]+]]:gprb(s32) = G_MUL [[COPY]], [[COPY1]]
+    ; MIPS32: $v0 = COPY [[MUL]](s32)
+    ; MIPS32: RetRA implicit $v0
+    %0:_(s32) = COPY $a0
+    %1:_(s32) = COPY $a1
+    %2:_(s32) = G_MUL %0, %1
+    $v0 = COPY %2(s32)
+    RetRA implicit $v0
+
+...