[llvm] [X86][CodeGen] Support lowering for CCMP/CTEST (PR #91747)
via llvm-commits
llvm-commits at lists.llvm.org
Sat May 11 09:16:48 PDT 2024
================
@@ -0,0 +1,1173 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+ccmp -x86-br-merging-base-cost=100 -verify-machineinstrs -show-mc-encoding | FileCheck %s
+; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+ccmp,+ndd -x86-br-merging-base-cost=100 -verify-machineinstrs -show-mc-encoding | FileCheck %s --check-prefix=NDD
+
+define void @ccmp8rr_zf(i8 noundef %a, i8 noundef %b, i8 noundef %c) {
+; CHECK-LABEL: ccmp8rr_zf:
+; CHECK: # %bb.0: # %entry
+; CHECK-NEXT: cmpb %dl, %dil # encoding: [0x40,0x38,0xd7]
+; CHECK-NEXT: ccmpneb {dfv=zf} %dl, %sil # encoding: [0x62,0xf4,0x14,0x05,0x38,0xd6]
+; CHECK-NEXT: jne .LBB0_1 # encoding: [0x75,A]
+; CHECK-NEXT: # fixup A - offset: 1, value: .LBB0_1-1, kind: FK_PCRel_1
+; CHECK-NEXT: # %bb.2: # %if.then
+; CHECK-NEXT: xorl %eax, %eax # encoding: [0x31,0xc0]
+; CHECK-NEXT: jmp foo # TAILCALL
+; CHECK-NEXT: # encoding: [0xeb,A]
+; CHECK-NEXT: # fixup A - offset: 1, value: foo-1, kind: FK_PCRel_1
+; CHECK-NEXT: .LBB0_1: # %if.end
+; CHECK-NEXT: retq # encoding: [0xc3]
+;
+; NDD-LABEL: ccmp8rr_zf:
+; NDD: # %bb.0: # %entry
+; NDD-NEXT: cmpb %dl, %dil # encoding: [0x40,0x38,0xd7]
+; NDD-NEXT: ccmpneb {dfv=zf} %dl, %sil # encoding: [0x62,0xf4,0x14,0x05,0x38,0xd6]
+; NDD-NEXT: jne .LBB0_1 # encoding: [0x75,A]
+; NDD-NEXT: # fixup A - offset: 1, value: .LBB0_1-1, kind: FK_PCRel_1
+; NDD-NEXT: # %bb.2: # %if.then
+; NDD-NEXT: xorl %eax, %eax # encoding: [0x31,0xc0]
+; NDD-NEXT: jmp foo # TAILCALL
+; NDD-NEXT: # encoding: [0xeb,A]
+; NDD-NEXT: # fixup A - offset: 1, value: foo-1, kind: FK_PCRel_1
+; NDD-NEXT: .LBB0_1: # %if.end
+; NDD-NEXT: retq # encoding: [0xc3]
+entry:
+ %cmp = icmp eq i8 %a, %c
+ %cmp1 = icmp eq i8 %b, %c
+ %or.cond = or i1 %cmp, %cmp1
+ br i1 %or.cond, label %if.then, label %if.end
+
+if.then: ; preds = %entry
+ tail call void (...) @foo()
+ br label %if.end
+
+if.end: ; preds = %entry, %if.then
+ ret void
+}
+
+define void @ccmp16rr_sf(i16 noundef %a, i16 noundef %b, i16 noundef %c) {
+; CHECK-LABEL: ccmp16rr_sf:
+; CHECK: # %bb.0: # %entry
+; CHECK-NEXT: cmpw %dx, %di # encoding: [0x66,0x39,0xd7]
+; CHECK-NEXT: ccmplew {dfv=sf} %dx, %si # encoding: [0x62,0xf4,0x25,0x0e,0x39,0xd6]
+; CHECK-NEXT: jge .LBB1_1 # encoding: [0x7d,A]
+; CHECK-NEXT: # fixup A - offset: 1, value: .LBB1_1-1, kind: FK_PCRel_1
+; CHECK-NEXT: # %bb.2: # %if.then
+; CHECK-NEXT: xorl %eax, %eax # encoding: [0x31,0xc0]
+; CHECK-NEXT: jmp foo # TAILCALL
+; CHECK-NEXT: # encoding: [0xeb,A]
+; CHECK-NEXT: # fixup A - offset: 1, value: foo-1, kind: FK_PCRel_1
+; CHECK-NEXT: .LBB1_1: # %if.end
+; CHECK-NEXT: retq # encoding: [0xc3]
+;
+; NDD-LABEL: ccmp16rr_sf:
+; NDD: # %bb.0: # %entry
+; NDD-NEXT: cmpw %dx, %di # encoding: [0x66,0x39,0xd7]
+; NDD-NEXT: ccmplew {dfv=sf} %dx, %si # encoding: [0x62,0xf4,0x25,0x0e,0x39,0xd6]
+; NDD-NEXT: jge .LBB1_1 # encoding: [0x7d,A]
+; NDD-NEXT: # fixup A - offset: 1, value: .LBB1_1-1, kind: FK_PCRel_1
+; NDD-NEXT: # %bb.2: # %if.then
+; NDD-NEXT: xorl %eax, %eax # encoding: [0x31,0xc0]
+; NDD-NEXT: jmp foo # TAILCALL
+; NDD-NEXT: # encoding: [0xeb,A]
+; NDD-NEXT: # fixup A - offset: 1, value: foo-1, kind: FK_PCRel_1
+; NDD-NEXT: .LBB1_1: # %if.end
+; NDD-NEXT: retq # encoding: [0xc3]
+entry:
+ %cmp = icmp sgt i16 %a, %c
+ %cmp1 = icmp slt i16 %b, %c
+ %or.cond = or i1 %cmp, %cmp1
+ br i1 %or.cond, label %if.then, label %if.end
+
+if.then: ; preds = %entry
+ tail call void (...) @foo()
+ br label %if.end
+
+if.end: ; preds = %entry, %if.then
+ ret void
+}
+
+define void @ccmp32rr_cf(i32 noundef %a, i32 noundef %b, i32 noundef %c) {
+; CHECK-LABEL: ccmp32rr_cf:
+; CHECK: # %bb.0: # %entry
+; CHECK-NEXT: cmpl %edx, %edi # encoding: [0x39,0xd7]
+; CHECK-NEXT: ccmpbl {dfv=cf} %edx, %esi # encoding: [0x62,0xf4,0x0c,0x02,0x39,0xd6]
+; CHECK-NEXT: ja .LBB2_1 # encoding: [0x77,A]
+; CHECK-NEXT: # fixup A - offset: 1, value: .LBB2_1-1, kind: FK_PCRel_1
+; CHECK-NEXT: # %bb.2: # %if.then
+; CHECK-NEXT: xorl %eax, %eax # encoding: [0x31,0xc0]
+; CHECK-NEXT: jmp foo # TAILCALL
+; CHECK-NEXT: # encoding: [0xeb,A]
+; CHECK-NEXT: # fixup A - offset: 1, value: foo-1, kind: FK_PCRel_1
+; CHECK-NEXT: .LBB2_1: # %if.end
+; CHECK-NEXT: retq # encoding: [0xc3]
+;
+; NDD-LABEL: ccmp32rr_cf:
+; NDD: # %bb.0: # %entry
+; NDD-NEXT: cmpl %edx, %edi # encoding: [0x39,0xd7]
+; NDD-NEXT: ccmpbl {dfv=cf} %edx, %esi # encoding: [0x62,0xf4,0x0c,0x02,0x39,0xd6]
+; NDD-NEXT: ja .LBB2_1 # encoding: [0x77,A]
+; NDD-NEXT: # fixup A - offset: 1, value: .LBB2_1-1, kind: FK_PCRel_1
+; NDD-NEXT: # %bb.2: # %if.then
+; NDD-NEXT: xorl %eax, %eax # encoding: [0x31,0xc0]
+; NDD-NEXT: jmp foo # TAILCALL
+; NDD-NEXT: # encoding: [0xeb,A]
+; NDD-NEXT: # fixup A - offset: 1, value: foo-1, kind: FK_PCRel_1
+; NDD-NEXT: .LBB2_1: # %if.end
+; NDD-NEXT: retq # encoding: [0xc3]
+entry:
+ %cmp = icmp uge i32 %a, %c
+ %cmp1 = icmp ule i32 %b, %c
+ %or.cond = or i1 %cmp, %cmp1
+ br i1 %or.cond, label %if.then, label %if.end
+
+if.then: ; preds = %entry
+ tail call void (...) @foo()
+ br label %if.end
+
+if.end: ; preds = %entry, %if.then
+ ret void
+}
+
+define void @ccmp64rr_of(i64 %a, i64 %b, i64 %c) {
+; CHECK-LABEL: ccmp64rr_of:
+; CHECK: # %bb.0: # %bb
+; CHECK-NEXT: cmpq %rdx, %rdi # encoding: [0x48,0x39,0xd7]
+; CHECK-NEXT: setb %al # encoding: [0x0f,0x92,0xc0]
+; CHECK-NEXT: cmpq %rsi, %rdi # encoding: [0x48,0x39,0xf7]
+; CHECK-NEXT: setno %cl # encoding: [0x0f,0x91,0xc1]
+; CHECK-NEXT: testb %cl, %al # encoding: [0x84,0xc8]
+; CHECK-NEXT: jne .LBB3_1 # encoding: [0x75,A]
+; CHECK-NEXT: # fixup A - offset: 1, value: .LBB3_1-1, kind: FK_PCRel_1
+; CHECK-NEXT: # %bb.2: # %if.then
+; CHECK-NEXT: xorl %eax, %eax # encoding: [0x31,0xc0]
+; CHECK-NEXT: jmp foo # TAILCALL
+; CHECK-NEXT: # encoding: [0xeb,A]
+; CHECK-NEXT: # fixup A - offset: 1, value: foo-1, kind: FK_PCRel_1
+; CHECK-NEXT: .LBB3_1: # %if.end
+; CHECK-NEXT: retq # encoding: [0xc3]
+;
+; NDD-LABEL: ccmp64rr_of:
+; NDD: # %bb.0: # %bb
+; NDD-NEXT: cmpq %rdx, %rdi # encoding: [0x48,0x39,0xd7]
+; NDD-NEXT: setb %al # encoding: [0x0f,0x92,0xc0]
+; NDD-NEXT: cmpq %rsi, %rdi # encoding: [0x48,0x39,0xf7]
+; NDD-NEXT: setno %cl # encoding: [0x0f,0x91,0xc1]
+; NDD-NEXT: andb %cl, %al # EVEX TO LEGACY Compression encoding: [0x20,0xc8]
+; NDD-NEXT: jne .LBB3_1 # encoding: [0x75,A]
+; NDD-NEXT: # fixup A - offset: 1, value: .LBB3_1-1, kind: FK_PCRel_1
+; NDD-NEXT: # %bb.2: # %if.then
+; NDD-NEXT: xorl %eax, %eax # encoding: [0x31,0xc0]
+; NDD-NEXT: jmp foo # TAILCALL
+; NDD-NEXT: # encoding: [0xeb,A]
+; NDD-NEXT: # fixup A - offset: 1, value: foo-1, kind: FK_PCRel_1
+; NDD-NEXT: .LBB3_1: # %if.end
+; NDD-NEXT: retq # encoding: [0xc3]
+bb:
+ %cmp = icmp uge i64 %a, %c
+ %smul = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
+ %obit = extractvalue {i64, i1} %smul, 1
+ %or.cond = or i1 %cmp, %obit
+ br i1 %or.cond, label %if.then, label %if.end
+
+if.then: ; preds = %entry
+ tail call void (...) @foo()
+ br label %if.end
+
+if.end: ; preds = %entry, %if.then
+ ret void
+}
+
+define void @ccmp64rr_of_crossbb(i64 %a, i64 %b) {
+; CHECK-LABEL: ccmp64rr_of_crossbb:
+; CHECK: # %bb.0: # %bb
+; CHECK-NEXT: testq %rdi, %rdi # encoding: [0x48,0x85,0xff]
+; CHECK-NEXT: je .LBB4_2 # encoding: [0x74,A]
+; CHECK-NEXT: # fixup A - offset: 1, value: .LBB4_2-1, kind: FK_PCRel_1
+; CHECK-NEXT: # %bb.1: # %bb1
+; CHECK-NEXT: cmpq %rsi, %rdi # encoding: [0x48,0x39,0xf7]
+; CHECK-NEXT: .LBB4_2: # %bb3
+; CHECK-NEXT: retq # encoding: [0xc3]
+;
+; NDD-LABEL: ccmp64rr_of_crossbb:
+; NDD: # %bb.0: # %bb
+; NDD-NEXT: testq %rdi, %rdi # encoding: [0x48,0x85,0xff]
+; NDD-NEXT: je .LBB4_2 # encoding: [0x74,A]
+; NDD-NEXT: # fixup A - offset: 1, value: .LBB4_2-1, kind: FK_PCRel_1
+; NDD-NEXT: # %bb.1: # %bb1
+; NDD-NEXT: cmpq %rsi, %rdi # encoding: [0x48,0x39,0xf7]
+; NDD-NEXT: .LBB4_2: # %bb3
+; NDD-NEXT: retq # encoding: [0xc3]
+bb:
+ %cond1 = icmp eq i64 %a, 0
----------------
goldsteinn wrote:
Can you increase the default for `BrMergingBaseCostThresh` if APX is available?
https://github.com/llvm/llvm-project/pull/91747
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