[llvm] [RISCV][GISel] Lower G_SSUBE (PR #157855)
Craig Topper via llvm-commits
llvm-commits at lists.llvm.org
Fri Sep 12 11:03:10 PDT 2025
================
@@ -0,0 +1,208 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -mtriple=riscv64 -run-pass=legalizer %s -o - | FileCheck %s
+
+---
+name: ssube_i8
+body: |
+ bb.1:
+ liveins: $x10, $x11, $x12
+
+ ; CHECK-LABEL: name: ssube_i8
+ ; CHECK: liveins: $x10, $x11, $x12
+ ; CHECK-NEXT: {{ $}}
+ ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+ ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+ ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x12
+ ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 56
+ ; CHECK-NEXT: [[SHL:%[0-9]+]]:_(s64) = G_SHL [[COPY]], [[C]](s64)
+ ; CHECK-NEXT: [[ASHR:%[0-9]+]]:_(s64) = G_ASHR [[SHL]], [[C]](s64)
+ ; CHECK-NEXT: [[SHL1:%[0-9]+]]:_(s64) = G_SHL [[COPY1]], [[C]](s64)
+ ; CHECK-NEXT: [[ASHR1:%[0-9]+]]:_(s64) = G_ASHR [[SHL1]], [[C]](s64)
+ ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s64) = G_SUB [[ASHR]], [[ASHR1]]
+ ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
+ ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND [[COPY2]], [[C1]]
+ ; CHECK-NEXT: [[SUB1:%[0-9]+]]:_(s64) = G_SUB [[SUB]], [[AND]]
+ ; CHECK-NEXT: [[SHL2:%[0-9]+]]:_(s64) = G_SHL [[SUB1]], [[C]](s64)
+ ; CHECK-NEXT: [[ASHR2:%[0-9]+]]:_(s64) = G_ASHR [[SHL2]], [[C]](s64)
+ ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(s64) = G_ICMP intpred(ne), [[SUB1]](s64), [[ASHR2]]
+ ; CHECK-NEXT: $x10 = COPY [[SUB1]](s64)
+ ; CHECK-NEXT: $x11 = COPY [[ICMP]](s64)
+ ; CHECK-NEXT: PseudoRET implicit $x10, implicit $x11
+ %0:_(s64) = COPY $x10
+ %1:_(s8) = G_TRUNC %0(s64)
+ %2:_(s64) = COPY $x11
+ %3:_(s8) = G_TRUNC %2(s64)
+ %4:_(s64) = COPY $x12
+ %5:_(s1) = G_TRUNC %4(s64)
+ %6:_(s8), %7:_(s1) = G_SSUBE %1, %3, %5
+ %8:_(s64) = G_ANYEXT %6(s8)
+ %9:_(s64) = G_ANYEXT %7(s1)
+ $x10 = COPY %8(s64)
+ $x11 = COPY %9(s64)
+ PseudoRET implicit $x10, implicit $x11
+
+...
+---
+name: ssube_i16
+body: |
+ bb.1:
+ liveins: $x10, $x11, $x12
+
+ ; CHECK-LABEL: name: ssube_i16
+ ; CHECK: liveins: $x10, $x11, $x12
+ ; CHECK-NEXT: {{ $}}
+ ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+ ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+ ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x12
+ ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 48
+ ; CHECK-NEXT: [[SHL:%[0-9]+]]:_(s64) = G_SHL [[COPY]], [[C]](s64)
+ ; CHECK-NEXT: [[ASHR:%[0-9]+]]:_(s64) = G_ASHR [[SHL]], [[C]](s64)
+ ; CHECK-NEXT: [[SHL1:%[0-9]+]]:_(s64) = G_SHL [[COPY1]], [[C]](s64)
+ ; CHECK-NEXT: [[ASHR1:%[0-9]+]]:_(s64) = G_ASHR [[SHL1]], [[C]](s64)
+ ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s64) = G_SUB [[ASHR]], [[ASHR1]]
+ ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
+ ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND [[COPY2]], [[C1]]
+ ; CHECK-NEXT: [[SUB1:%[0-9]+]]:_(s64) = G_SUB [[SUB]], [[AND]]
+ ; CHECK-NEXT: [[SHL2:%[0-9]+]]:_(s64) = G_SHL [[SUB1]], [[C]](s64)
+ ; CHECK-NEXT: [[ASHR2:%[0-9]+]]:_(s64) = G_ASHR [[SHL2]], [[C]](s64)
+ ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(s64) = G_ICMP intpred(ne), [[SUB1]](s64), [[ASHR2]]
+ ; CHECK-NEXT: $x10 = COPY [[SUB1]](s64)
+ ; CHECK-NEXT: $x11 = COPY [[ICMP]](s64)
+ ; CHECK-NEXT: PseudoRET implicit $x10, implicit $x11
+ %0:_(s64) = COPY $x10
+ %1:_(s16) = G_TRUNC %0(s64)
+ %2:_(s64) = COPY $x11
+ %3:_(s16) = G_TRUNC %2(s64)
+ %4:_(s64) = COPY $x12
+ %5:_(s1) = G_TRUNC %4(s64)
+ %6:_(s16), %7:_(s1) = G_SSUBE %1, %3, %5
+ %8:_(s64) = G_ANYEXT %6(s16)
+ %9:_(s64) = G_ANYEXT %7(s1)
+ $x10 = COPY %8(s64)
+ $x11 = COPY %9(s64)
+ PseudoRET implicit $x10, implicit $x11
+
+...
+---
+name: ssube_i32
+body: |
+ bb.1:
+ liveins: $x10, $x11, $x12
+
+ ; CHECK-LABEL: name: ssube_i32
+ ; CHECK: liveins: $x10, $x11, $x12
+ ; CHECK-NEXT: {{ $}}
+ ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+ ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+ ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x12
+ ; CHECK-NEXT: [[SEXT_INREG:%[0-9]+]]:_(s64) = G_SEXT_INREG [[COPY]], 32
+ ; CHECK-NEXT: [[SEXT_INREG1:%[0-9]+]]:_(s64) = G_SEXT_INREG [[COPY1]], 32
+ ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s64) = G_SUB [[SEXT_INREG]], [[SEXT_INREG1]]
+ ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
+ ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND [[COPY2]], [[C]]
+ ; CHECK-NEXT: [[SUB1:%[0-9]+]]:_(s64) = G_SUB [[SUB]], [[AND]]
+ ; CHECK-NEXT: [[SEXT_INREG2:%[0-9]+]]:_(s64) = G_SEXT_INREG [[SUB1]], 32
+ ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(s64) = G_ICMP intpred(ne), [[SUB1]](s64), [[SEXT_INREG2]]
+ ; CHECK-NEXT: $x10 = COPY [[SUB1]](s64)
+ ; CHECK-NEXT: $x11 = COPY [[ICMP]](s64)
+ ; CHECK-NEXT: PseudoRET implicit $x10, implicit $x11
+ %0:_(s64) = COPY $x10
+ %1:_(s32) = G_TRUNC %0(s64)
+ %2:_(s64) = COPY $x11
+ %3:_(s32) = G_TRUNC %2(s64)
+ %4:_(s64) = COPY $x12
+ %5:_(s1) = G_TRUNC %4(s64)
+ %6:_(s32), %7:_(s1) = G_SSUBE %1, %3, %5
+ %8:_(s64) = G_ANYEXT %6(s32)
+ %9:_(s64) = G_ANYEXT %7(s1)
+ $x10 = COPY %8(s64)
+ $x11 = COPY %9(s64)
+ PseudoRET implicit $x10, implicit $x11
+
+...
+---
+name: ssube_i64
+body: |
+ bb.1:
+ liveins: $x10, $x11, $x12
+
+ ; CHECK-LABEL: name: ssube_i64
+ ; CHECK: liveins: $x10, $x11, $x12
+ ; CHECK-NEXT: {{ $}}
+ ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+ ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+ ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x12
+ ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
+ ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND [[COPY2]], [[C]]
+ ; CHECK-NEXT: [[ADD:%[0-9]+]]:_(s64) = G_ADD [[COPY1]], [[AND]]
+ ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s64) = G_SUB [[COPY]], [[ADD]]
+ ; CHECK-NEXT: [[COPY3:%[0-9]+]]:_(s64) = COPY [[SUB]](s64)
+ ; CHECK-NEXT: [[XOR:%[0-9]+]]:_(s64) = G_XOR [[COPY]], [[COPY1]]
+ ; CHECK-NEXT: [[XOR1:%[0-9]+]]:_(s64) = G_XOR [[COPY]], [[SUB]]
+ ; CHECK-NEXT: [[AND1:%[0-9]+]]:_(s64) = G_AND [[XOR]], [[XOR1]]
+ ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 0
+ ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(s64) = G_ICMP intpred(slt), [[AND1]](s64), [[C1]]
+ ; CHECK-NEXT: $x10 = COPY [[COPY3]](s64)
+ ; CHECK-NEXT: $x11 = COPY [[ICMP]](s64)
+ ; CHECK-NEXT: PseudoRET implicit $x10, implicit $x11
+ %0:_(s64) = COPY $x10
+ %1:_(s64) = COPY $x11
+ %2:_(s64) = COPY $x12
+ %3:_(s1) = G_TRUNC %2(s64)
+ %4:_(s64), %5:_(s1) = G_SSUBE %0, %1, %3
+ %6:_(s64) = G_ANYEXT %5(s1)
+ $x10 = COPY %4(s64)
+ $x11 = COPY %6(s64)
+ PseudoRET implicit $x10, implicit $x11
+
+...
+---
+name: ssube_i128
+body: |
+ bb.1:
+ liveins: $x10, $x11, $x12, $x13, $x14
+
+ ; CHECK-LABEL: name: ssube_i128
+ ; CHECK: liveins: $x10, $x11, $x12, $x13, $x14
+ ; CHECK-NEXT: {{ $}}
+ ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+ ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+ ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x12
+ ; CHECK-NEXT: [[COPY3:%[0-9]+]]:_(s64) = COPY $x13
+ ; CHECK-NEXT: [[COPY4:%[0-9]+]]:_(s64) = COPY $x14
+ ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
+ ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND [[COPY4]], [[C]]
+ ; CHECK-NEXT: [[ADD:%[0-9]+]]:_(s64) = G_ADD [[COPY2]], [[AND]]
+ ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s64) = G_SUB [[COPY]], [[ADD]]
+ ; CHECK-NEXT: [[COPY5:%[0-9]+]]:_(s64) = COPY [[SUB]](s64)
+ ; CHECK-NEXT: [[XOR:%[0-9]+]]:_(s64) = G_XOR [[COPY]], [[COPY2]]
+ ; CHECK-NEXT: [[XOR1:%[0-9]+]]:_(s64) = G_XOR [[COPY]], [[SUB]]
+ ; CHECK-NEXT: [[AND1:%[0-9]+]]:_(s64) = G_AND [[XOR]], [[XOR1]]
+ ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 0
+ ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(s64) = G_ICMP intpred(slt), [[AND1]](s64), [[C1]]
+ ; CHECK-NEXT: [[ADD1:%[0-9]+]]:_(s64) = G_ADD [[COPY3]], [[ICMP]]
+ ; CHECK-NEXT: [[SUB1:%[0-9]+]]:_(s64) = G_SUB [[COPY1]], [[ADD1]]
+ ; CHECK-NEXT: [[COPY6:%[0-9]+]]:_(s64) = COPY [[SUB1]](s64)
+ ; CHECK-NEXT: [[XOR2:%[0-9]+]]:_(s64) = G_XOR [[COPY1]], [[COPY3]]
+ ; CHECK-NEXT: [[XOR3:%[0-9]+]]:_(s64) = G_XOR [[COPY1]], [[SUB1]]
+ ; CHECK-NEXT: [[AND2:%[0-9]+]]:_(s64) = G_AND [[XOR2]], [[XOR3]]
+ ; CHECK-NEXT: [[ICMP1:%[0-9]+]]:_(s64) = G_ICMP intpred(slt), [[AND2]](s64), [[C1]]
+ ; CHECK-NEXT: $x10 = COPY [[COPY5]](s64)
+ ; CHECK-NEXT: $x11 = COPY [[COPY6]](s64)
+ ; CHECK-NEXT: $x12 = COPY [[ICMP1]](s64)
+ ; CHECK-NEXT: PseudoRET implicit $x10, implicit $x11, implicit $x12
+ %0:_(s64) = COPY $x10
+ %1:_(s64) = COPY $x11
+ %2:_(s64) = COPY $x12
+ %3:_(s64) = COPY $x13
+ %4:_(s64) = COPY $x14
+ %5:_(s1) = G_TRUNC %4(s64)
+ %6:_(s64), %7:_(s1) = G_SSUBE %0, %2, %5
----------------
topperc wrote:
This is just testing 2 s64 G_SSUBE instead of one s128.
https://github.com/llvm/llvm-project/pull/157855
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