[llvm] [AMDGPU] Recognise bitmask operations as srcmods on select (PR #152119)
via llvm-commits
llvm-commits at lists.llvm.org
Tue Aug 5 09:35:24 PDT 2025
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-backend-amdgpu
Author: Chris Jackson (chrisjbris)
<details>
<summary>Changes</summary>
This is a second attempt at https://github.com/llvm/llvm-project/pull/149110, which did not limit the implementation to select/v_cndmask and resulted in buildbot failures. I'm now gating the conversion of the bitmask ops on "IsCanonicalizing", based on the definition of this flag/method in SIInstrinfo.td. This restricts the conversion of the bitmasks to a few instructions that definitely support input srcmods in tablegen.
Add to the VOP patterns to recognise when or/xor/and are modifying only the sign bit and replace with the appropriate srcmod. This enables the use of fp src mods on integers.
I think this method is preferred to https://github.com/llvm/llvm-project/pull/147325, as it is simpler and avoids the workarounds for simplydemandedbits / doesn't have to be awkwardly imposed on the Target Independent Combine.
I was uncertain about the status of srcmods for the 16-bit types, so this type is intentionally left unaffected.
---
Patch is 85.87 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/152119.diff
5 Files Affected:
- (modified) llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp (+36)
- (modified) llvm/test/CodeGen/AMDGPU/fneg-modifier-casting.ll (+15-26)
- (added) llvm/test/CodeGen/AMDGPU/integer-select-src-modifiers.ll (+1011)
- (modified) llvm/test/CodeGen/AMDGPU/saddsat.ll (+21-31)
- (modified) llvm/test/CodeGen/AMDGPU/ssubsat.ll (+153-225)
``````````diff
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp b/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
index 25672a52345cb..46088d43e190a 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
@@ -3036,6 +3036,42 @@ bool AMDGPUDAGToDAGISel::SelectVOP3ModsImpl(SDValue In, SDValue &Src,
Src = Src.getOperand(0);
}
+ // Convert various sign-bit masks on integers to src mods. Currently disabled
+ // for 16-bit types as the codegen replaces the operand without adding a
+ // srcmod. This is intentionally finding the cases where we are performing
+ // float neg and abs on int types, the goal is not to obtain two's complement
+ // neg or abs. Limit converison to select operands via the nonCanonalizing
+ // pattern.
+ // TODO: Add 16-bit support.
+ if (IsCanonicalizing)
+ return true;
+
+ unsigned Opc = Src->getOpcode();
+ EVT VT = Src.getValueType();
+ if ((Opc != ISD::AND && Opc != ISD::OR && Opc != ISD::XOR) ||
+ (VT != MVT::i32 && VT != MVT::v2i32 && VT != MVT::i64))
+ return true;
+
+ ConstantSDNode *CRHS = dyn_cast<ConstantSDNode>(Src->getOperand(1));
+ if (!CRHS)
+ return true;
+
+ // Recognise (xor a, 0x80000000) as NEG SrcMod.
+ // Recognise (and a, 0x7fffffff) as ABS SrcMod.
+ // Recognise (or a, 0x80000000) as NEG+ABS SrcModifiers.
+ if (Opc == ISD::XOR && CRHS->getAPIntValue().isSignMask()) {
+ Mods |= SISrcMods::NEG;
+ Src = Src.getOperand(0);
+ } else if (Opc == ISD::AND && AllowAbs &&
+ CRHS->getAPIntValue().isMaxSignedValue()) {
+ Mods |= SISrcMods::ABS;
+ Src = Src.getOperand(0);
+ } else if (Opc == ISD::OR && AllowAbs && CRHS->getAPIntValue().isSignMask()) {
+ Mods |= SISrcMods::ABS;
+ Mods |= SISrcMods::NEG;
+ Src = Src.getOperand(0);
+ }
+
return true;
}
diff --git a/llvm/test/CodeGen/AMDGPU/fneg-modifier-casting.ll b/llvm/test/CodeGen/AMDGPU/fneg-modifier-casting.ll
index 1b092b283290a..5674ae328406d 100644
--- a/llvm/test/CodeGen/AMDGPU/fneg-modifier-casting.ll
+++ b/llvm/test/CodeGen/AMDGPU/fneg-modifier-casting.ll
@@ -349,29 +349,24 @@ define i32 @select_fneg_xor_select_i32(i1 %cond0, i1 %cond1, i32 %arg0, i32 %arg
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_and_b32_e32 v0, 1, v0
-; GCN-NEXT: v_xor_b32_e32 v2, 0x80000000, v2
-; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 1, v0
; GCN-NEXT: v_and_b32_e32 v1, 1, v1
-; GCN-NEXT: v_cndmask_b32_e32 v0, v2, v3, vcc
-; GCN-NEXT: v_xor_b32_e32 v2, 0x80000000, v0
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 1, v0
+; GCN-NEXT: v_cndmask_b32_e64 v0, -v2, v3, vcc
; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 1, v1
-; GCN-NEXT: v_cndmask_b32_e32 v0, v0, v2, vcc
+; GCN-NEXT: v_cndmask_b32_e64 v0, v0, -v0, vcc
; GCN-NEXT: s_setpc_b64 s[30:31]
;
; GFX11-LABEL: select_fneg_xor_select_i32:
; GFX11: ; %bb.0:
; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX11-NEXT: v_and_b32_e32 v0, 1, v0
-; GFX11-NEXT: v_xor_b32_e32 v2, 0x80000000, v2
; GFX11-NEXT: v_and_b32_e32 v1, 1, v1
-; GFX11-NEXT: s_delay_alu instid0(VALU_DEP_3) | instskip(NEXT) | instid1(VALU_DEP_3)
+; GFX11-NEXT: s_delay_alu instid0(VALU_DEP_2) | instskip(SKIP_1) | instid1(VALU_DEP_3)
; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 1, v0
-; GFX11-NEXT: v_cndmask_b32_e32 v0, v2, v3, vcc_lo
-; GFX11-NEXT: s_delay_alu instid0(VALU_DEP_3) | instskip(NEXT) | instid1(VALU_DEP_2)
+; GFX11-NEXT: v_cndmask_b32_e64 v0, -v2, v3, vcc_lo
; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 1, v1
-; GFX11-NEXT: v_xor_b32_e32 v2, 0x80000000, v0
-; GFX11-NEXT: s_delay_alu instid0(VALU_DEP_1)
-; GFX11-NEXT: v_cndmask_b32_e32 v0, v0, v2, vcc_lo
+; GFX11-NEXT: s_delay_alu instid0(VALU_DEP_2)
+; GFX11-NEXT: v_cndmask_b32_e64 v0, v0, -v0, vcc_lo
; GFX11-NEXT: s_setpc_b64 s[30:31]
%fneg0 = xor i32 %arg0, -2147483648
%select0 = select i1 %cond0, i32 %arg1, i32 %fneg0
@@ -550,31 +545,25 @@ define i64 @select_fneg_xor_select_i64(i1 %cond0, i1 %cond1, i64 %arg0, i64 %arg
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_and_b32_e32 v0, 1, v0
-; GCN-NEXT: v_xor_b32_e32 v3, 0x80000000, v3
-; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 1, v0
; GCN-NEXT: v_and_b32_e32 v1, 1, v1
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 1, v0
; GCN-NEXT: v_cndmask_b32_e32 v0, v2, v4, vcc
-; GCN-NEXT: v_cndmask_b32_e32 v2, v3, v5, vcc
-; GCN-NEXT: v_xor_b32_e32 v3, 0x80000000, v2
+; GCN-NEXT: v_cndmask_b32_e64 v2, -v3, v5, vcc
; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 1, v1
-; GCN-NEXT: v_cndmask_b32_e32 v1, v2, v3, vcc
+; GCN-NEXT: v_cndmask_b32_e64 v1, v2, -v2, vcc
; GCN-NEXT: s_setpc_b64 s[30:31]
;
; GFX11-LABEL: select_fneg_xor_select_i64:
; GFX11: ; %bb.0:
; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX11-NEXT: v_and_b32_e32 v0, 1, v0
-; GFX11-NEXT: v_xor_b32_e32 v3, 0x80000000, v3
-; GFX11-NEXT: v_and_b32_e32 v1, 1, v1
-; GFX11-NEXT: s_delay_alu instid0(VALU_DEP_3) | instskip(SKIP_1) | instid1(VALU_DEP_4)
+; GFX11-NEXT: s_delay_alu instid0(VALU_DEP_1) | instskip(SKIP_2) | instid1(VALU_DEP_2)
; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 1, v0
-; GFX11-NEXT: v_cndmask_b32_e32 v0, v2, v4, vcc_lo
-; GFX11-NEXT: v_cndmask_b32_e32 v2, v3, v5, vcc_lo
-; GFX11-NEXT: s_delay_alu instid0(VALU_DEP_4) | instskip(NEXT) | instid1(VALU_DEP_2)
+; GFX11-NEXT: v_dual_cndmask_b32 v0, v2, v4 :: v_dual_and_b32 v1, 1, v1
+; GFX11-NEXT: v_cndmask_b32_e64 v2, -v3, v5, vcc_lo
; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 1, v1
-; GFX11-NEXT: v_xor_b32_e32 v3, 0x80000000, v2
-; GFX11-NEXT: s_delay_alu instid0(VALU_DEP_1)
-; GFX11-NEXT: v_cndmask_b32_e32 v1, v2, v3, vcc_lo
+; GFX11-NEXT: s_delay_alu instid0(VALU_DEP_2)
+; GFX11-NEXT: v_cndmask_b32_e64 v1, v2, -v2, vcc_lo
; GFX11-NEXT: s_setpc_b64 s[30:31]
%fneg0 = xor i64 %arg0, 9223372036854775808
%select0 = select i1 %cond0, i64 %arg1, i64 %fneg0
diff --git a/llvm/test/CodeGen/AMDGPU/integer-select-src-modifiers.ll b/llvm/test/CodeGen/AMDGPU/integer-select-src-modifiers.ll
new file mode 100644
index 0000000000000..b3c7ac80dd014
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/integer-select-src-modifiers.ll
@@ -0,0 +1,1011 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx700 < %s | FileCheck -check-prefixes=GCN,GFX7 %s
+; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 < %s | FileCheck -check-prefixes=GCN,GFX9 %s
+; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1100 -mattr=+real-true16 < %s | FileCheck -check-prefixes=GFX11,GFX11-TRUE16 %s
+; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1100 -mattr=-real-true16 < %s | FileCheck -check-prefixes=GFX11,GFX11-FAKE16 %s
+
+define i32 @fneg_select_i32_1(i32 %cond, i32 %a, i32 %b) {
+; GCN-LABEL: fneg_select_i32_1:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v0
+; GCN-NEXT: v_cndmask_b32_e64 v0, v2, -v1, vcc
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: fneg_select_i32_1:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v0
+; GFX11-NEXT: v_cndmask_b32_e64 v0, v2, -v1, vcc_lo
+; GFX11-NEXT: s_setpc_b64 s[30:31]
+ %neg.a = xor i32 %a, u0x80000000
+ %cmp = icmp eq i32 %cond, zeroinitializer
+ %select = select i1 %cmp, i32 %neg.a, i32 %b
+ ret i32 %select
+}
+
+define i32 @fneg_select_i32_2(i32 %cond, i32 %a, i32 %b) {
+; GCN-LABEL: fneg_select_i32_2:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v0
+; GCN-NEXT: v_cndmask_b32_e64 v0, -v1, v2, vcc
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: fneg_select_i32_2:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v0
+; GFX11-NEXT: v_cndmask_b32_e64 v0, -v1, v2, vcc_lo
+; GFX11-NEXT: s_setpc_b64 s[30:31]
+ %neg.a = xor i32 %a, u0x80000000
+ %cmp = icmp eq i32 %cond, zeroinitializer
+ %select = select i1 %cmp, i32 %b, i32 %neg.a
+ ret i32 %select
+}
+
+define i32 @fneg_select_i32_both(i32 %cond, i32 %a, i32 %b) {
+; GCN-LABEL: fneg_select_i32_both:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v0
+; GCN-NEXT: v_cndmask_b32_e64 v0, -v2, -v1, vcc
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: fneg_select_i32_both:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v0
+; GFX11-NEXT: v_cndmask_b32_e64 v0, -v2, -v1, vcc_lo
+; GFX11-NEXT: s_setpc_b64 s[30:31]
+ %neg.a = xor i32 %a, u0x80000000
+ %neg.b = xor i32 %b, u0x80000000
+ %cmp = icmp eq i32 %cond, zeroinitializer
+ %select = select i1 %cmp, i32 %neg.a, i32 %neg.b
+ ret i32 %select
+}
+
+define i32 @fneg_1_fabs_2_select_i32(i32 %cond, i32 %a, i32 %b) {
+; GCN-LABEL: fneg_1_fabs_2_select_i32:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v0
+; GCN-NEXT: v_cndmask_b32_e64 v0, |v1|, -v1, vcc
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: fneg_1_fabs_2_select_i32:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v0
+; GFX11-NEXT: v_cndmask_b32_e64 v0, |v1|, -v1, vcc_lo
+; GFX11-NEXT: s_setpc_b64 s[30:31]
+ %neg.a = xor i32 %a, u0x80000000
+ %abs.b = and i32 %a, u0x7fffffff
+ %cmp = icmp eq i32 %cond, zeroinitializer
+ %select = select i1 %cmp, i32 %neg.a, i32 %abs.b
+ ret i32 %select
+}
+
+define i32 @s_fneg_select_i32_1(i32 inreg %cond, i32 inreg %a, i32 inreg %b) {
+; GCN-LABEL: s_fneg_select_i32_1:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: s_xor_b32 s4, s17, 0x80000000
+; GCN-NEXT: s_cmp_eq_u32 s16, 0
+; GCN-NEXT: s_cselect_b32 s4, s4, s18
+; GCN-NEXT: v_mov_b32_e32 v0, s4
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: s_fneg_select_i32_1:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT: s_xor_b32 s1, s1, 0x80000000
+; GFX11-NEXT: s_cmp_eq_u32 s0, 0
+; GFX11-NEXT: s_cselect_b32 s0, s1, s2
+; GFX11-NEXT: s_delay_alu instid0(SALU_CYCLE_1)
+; GFX11-NEXT: v_mov_b32_e32 v0, s0
+; GFX11-NEXT: s_setpc_b64 s[30:31]
+ %neg.a = xor i32 %a, u0x80000000
+ %cmp = icmp eq i32 %cond, zeroinitializer
+ %select = select i1 %cmp, i32 %neg.a, i32 %b
+ ret i32 %select
+}
+
+define i32 @s_fneg_1_fabs_2_select_i32(i32 inreg %cond, i32 %a, i32 %b) {
+; GCN-LABEL: s_fneg_1_fabs_2_select_i32:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: s_cmp_eq_u32 s16, 0
+; GCN-NEXT: s_cselect_b64 s[4:5], -1, 0
+; GCN-NEXT: v_cndmask_b32_e64 v0, |v0|, -v0, s[4:5]
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: s_fneg_1_fabs_2_select_i32:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT: s_cmp_eq_u32 s0, 0
+; GFX11-NEXT: s_cselect_b32 s0, -1, 0
+; GFX11-NEXT: s_delay_alu instid0(SALU_CYCLE_1)
+; GFX11-NEXT: v_cndmask_b32_e64 v0, |v0|, -v0, s0
+; GFX11-NEXT: s_setpc_b64 s[30:31]
+ %neg.a = xor i32 %a, u0x80000000
+ %abs.b = and i32 %a, u0x7fffffff
+ %cmp = icmp eq i32 %cond, zeroinitializer
+ %select = select i1 %cmp, i32 %neg.a, i32 %abs.b
+ ret i32 %select
+}
+
+define <2 x i32> @fneg_select_v2i32_1(<2 x i32> %cond, <2 x i32> %a, <2 x i32> %b) {
+; GCN-LABEL: fneg_select_v2i32_1:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v0
+; GCN-NEXT: v_cndmask_b32_e64 v0, v4, -v2, vcc
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v1
+; GCN-NEXT: v_cndmask_b32_e64 v1, v5, -v3, vcc
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: fneg_select_v2i32_1:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v0
+; GFX11-NEXT: v_cndmask_b32_e64 v0, v4, -v2, vcc_lo
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v1
+; GFX11-NEXT: v_cndmask_b32_e64 v1, v5, -v3, vcc_lo
+; GFX11-NEXT: s_setpc_b64 s[30:31]
+ %neg.a = xor <2 x i32> %a, splat (i32 u0x80000000)
+ %cmp = icmp eq <2 x i32> %cond, zeroinitializer
+ %select = select <2 x i1> %cmp, <2 x i32> %neg.a, <2 x i32> %b
+ ret <2 x i32> %select
+}
+
+define <2 x i32> @fneg_select_v2i32_2(<2 x i32> %cond, <2 x i32> %a, <2 x i32> %b) {
+; GCN-LABEL: fneg_select_v2i32_2:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v0
+; GCN-NEXT: v_cndmask_b32_e64 v0, -v2, v4, vcc
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v1
+; GCN-NEXT: v_cndmask_b32_e64 v1, -v3, v5, vcc
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: fneg_select_v2i32_2:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v0
+; GFX11-NEXT: v_cndmask_b32_e64 v0, -v2, v4, vcc_lo
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v1
+; GFX11-NEXT: v_cndmask_b32_e64 v1, -v3, v5, vcc_lo
+; GFX11-NEXT: s_setpc_b64 s[30:31]
+ %neg.a = xor <2 x i32> %a, splat (i32 u0x80000000)
+ %cmp = icmp eq <2 x i32> %cond, zeroinitializer
+ %select = select <2 x i1> %cmp, <2 x i32> %b, <2 x i32> %neg.a
+ ret <2 x i32> %select
+}
+
+define i32 @fabs_select_i32_1(i32 %cond, i32 %a, i32 %b) {
+; GCN-LABEL: fabs_select_i32_1:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v0
+; GCN-NEXT: v_cndmask_b32_e64 v0, v2, |v1|, vcc
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: fabs_select_i32_1:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v0
+; GFX11-NEXT: v_cndmask_b32_e64 v0, v2, |v1|, vcc_lo
+; GFX11-NEXT: s_setpc_b64 s[30:31]
+ %neg.a = and i32 %a, u0x7fffffff
+ %cmp = icmp eq i32 %cond, zeroinitializer
+ %select = select i1 %cmp, i32 %neg.a, i32 %b
+ ret i32 %select
+}
+
+define i32 @fabs_select_i32_2(i32 %cond, i32 %a, i32 %b) {
+; GCN-LABEL: fabs_select_i32_2:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v0
+; GCN-NEXT: v_cndmask_b32_e64 v0, |v1|, v2, vcc
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: fabs_select_i32_2:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v0
+; GFX11-NEXT: v_cndmask_b32_e64 v0, |v1|, v2, vcc_lo
+; GFX11-NEXT: s_setpc_b64 s[30:31]
+ %neg.a = and i32 %a, u0x7fffffff
+ %cmp = icmp eq i32 %cond, zeroinitializer
+ %select = select i1 %cmp, i32 %b, i32 %neg.a
+ ret i32 %select
+}
+
+define <2 x i32> @fneg_1_fabs_2_select_v2i32(<2 x i32> %cond, <2 x i32> %a, <2 x i32> %b) {
+; GCN-LABEL: fneg_1_fabs_2_select_v2i32:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v0
+; GCN-NEXT: v_cndmask_b32_e64 v0, -v2, |v2|, vcc
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v1
+; GCN-NEXT: v_cndmask_b32_e64 v1, -v3, |v3|, vcc
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: fneg_1_fabs_2_select_v2i32:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v0
+; GFX11-NEXT: v_cndmask_b32_e64 v0, -v2, |v2|, vcc_lo
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v1
+; GFX11-NEXT: v_cndmask_b32_e64 v1, -v3, |v3|, vcc_lo
+; GFX11-NEXT: s_setpc_b64 s[30:31]
+ %neg.a = xor <2 x i32> %a, splat (i32 u0x80000000)
+ %abs.b = and <2 x i32> %a, splat (i32 u0x7fffffff)
+ %cmp = icmp eq <2 x i32> %cond, zeroinitializer
+ %select = select <2 x i1> %cmp, <2 x i32> %abs.b, <2 x i32> %neg.a
+ ret <2 x i32> %select
+}
+
+define i32 @fneg_fabs_select_i32_1(i32 %cond, i32 %a, i32 %b) {
+; GCN-LABEL: fneg_fabs_select_i32_1:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v0
+; GCN-NEXT: v_cndmask_b32_e64 v0, v2, -|v1|, vcc
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: fneg_fabs_select_i32_1:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v0
+; GFX11-NEXT: v_cndmask_b32_e64 v0, v2, -|v1|, vcc_lo
+; GFX11-NEXT: s_setpc_b64 s[30:31]
+ %neg.a = or i32 %a, u0x80000000
+ %cmp = icmp eq i32 %cond, zeroinitializer
+ %select = select i1 %cmp, i32 %neg.a, i32 %b
+ ret i32 %select
+}
+
+define i32 @fneg_fabs_select_i32_2(i32 %cond, i32 %a, i32 %b) {
+; GCN-LABEL: fneg_fabs_select_i32_2:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v0
+; GCN-NEXT: v_cndmask_b32_e64 v0, -|v1|, v2, vcc
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: fneg_fabs_select_i32_2:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v0
+; GFX11-NEXT: v_cndmask_b32_e64 v0, -|v1|, v2, vcc_lo
+; GFX11-NEXT: s_setpc_b64 s[30:31]
+ %neg.a = or i32 %a, u0x80000000
+ %cmp = icmp eq i32 %cond, zeroinitializer
+ %select = select i1 %cmp, i32 %b, i32 %neg.a
+ ret i32 %select
+}
+
+define <2 x i32> @fneg_fabs_select_v2i32_1(<2 x i32> %cond, <2 x i32> %a, <2 x i32> %b) {
+; GCN-LABEL: fneg_fabs_select_v2i32_1:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v0
+; GCN-NEXT: v_cndmask_b32_e64 v0, v4, -|v2|, vcc
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v1
+; GCN-NEXT: v_cndmask_b32_e64 v1, v5, -|v3|, vcc
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: fneg_fabs_select_v2i32_1:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v0
+; GFX11-NEXT: v_cndmask_b32_e64 v0, v4, -|v2|, vcc_lo
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v1
+; GFX11-NEXT: v_cndmask_b32_e64 v1, v5, -|v3|, vcc_lo
+; GFX11-NEXT: s_setpc_b64 s[30:31]
+ %neg.a = or <2 x i32> %a, splat (i32 u0x80000000)
+ %cmp = icmp eq <2 x i32> %cond, zeroinitializer
+ %select = select <2 x i1> %cmp, <2 x i32> %neg.a, <2 x i32> %b
+ ret <2 x i32> %select
+}
+
+define <2 x i32> @fneg_fabs_select_v2i32_2(<2 x i32> %cond, <2 x i32> %a, <2 x i32> %b) {
+; GCN-LABEL: fneg_fabs_select_v2i32_2:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v0
+; GCN-NEXT: v_cndmask_b32_e64 v0, -|v2|, v4, vcc
+; GCN-NEXT: v_cmp_eq_u32_e32 vcc, 0, v1
+; GCN-NEXT: v_cndmask_b32_e64 v1, -|v3|, v5, vcc
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: fneg_fabs_select_v2i32_2:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v0
+; GFX11-NEXT: v_cndmask_b32_e64 v0, -|v2|, v4, vcc_lo
+; GFX11-NEXT: v_cmp_eq_u32_e32 vcc_lo, 0, v1
+; GFX11-NEXT: v_cndmask_b32_e64 v1, -|v3|, v5, vcc_lo
+; GFX11-NEXT: s_setpc_b64 s[30:31]
+ %neg.a = or <2 x i32> %a, splat (i32 u0x80000000)
+ %cmp = icmp eq <2 x i32> %cond, zeroinitializer
+ %select = select <2 x i1> %cmp, <2 x i32> %b, <2 x i32> %neg.a
+ ret <2 x i32> %select
+}
+
+
+define <2 x i32> @s_fneg_select_v2i32_1(<2 x i32> inreg %cond, <2 x i32> inreg %a, <2 x i32> inreg %b) {
+; GCN-LABEL: s_fneg_select_v2i32_1:
+; GCN: ; %bb.0:
+; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT: s_xor_b32 s4, s19, 0x80000000
+; GCN-NEXT: s_xor_b32 s5, s18, 0x80000000
+; GCN-NEXT: s_cmp_eq_u32 s16, 0
+; GCN-NEXT: s_cselect_b32 s5, s5, s20
+; GCN-NEXT: s_cmp_eq_u32 s17, 0
+; GCN-NEXT: s_cselect_b32 s4, s4, s21
+; GCN-NEXT: v_mov_b32_e32 v0, s5
+; GCN-NEXT: v_mov_b32_e32 v1, s4
+; GCN-NEXT: s_setpc_b64 s[30:31]
+;
+; GFX11-LABEL: s_fneg_select_v2i32_1:
+; GFX11: ; %bb.0:
+; GFX11-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+;...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/152119
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