[llvm] Revert "[AMDGPU] Sign extend simm16 in setreg intrinsic" (PR #78372)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-amdgpu

Author: Florian Mayer (fmayer)

<details>
<summary>Changes</summary>

Reverts llvm/llvm-project#<!-- -->77997

Broke UBSan bots.

---
Full diff: https://github.com/llvm/llvm-project/pull/78372.diff


3 Files Affected:

- (modified) llvm/lib/Target/AMDGPU/SIInstrInfo.td (+6-3) 
- (modified) llvm/lib/Target/AMDGPU/SOPInstructions.td (+1-1) 
- (modified) llvm/test/CodeGen/AMDGPU/llvm.amdgcn.s.setreg.ll (-66) 


``````````diff
diff --git a/llvm/lib/Target/AMDGPU/SIInstrInfo.td b/llvm/lib/Target/AMDGPU/SIInstrInfo.td
index e0e9aee3ebe002..7a65f8038c6983 100644
--- a/llvm/lib/Target/AMDGPU/SIInstrInfo.td
+++ b/llvm/lib/Target/AMDGPU/SIInstrInfo.td
@@ -767,9 +767,12 @@ class bitextract_imm<int bitnum> : SDNodeXForm<imm, [{
   return CurDAG->getTargetConstant(Bit, SDLoc(N), MVT::i1);
 }]>;
 
-def SIMM16bit : TImmLeaf <i32,
-  [{return isInt<16>(Imm) || isUInt<16>(Imm);}],
-  as_i16timm
+def SIMM16bit : ImmLeaf <i32,
+  [{return isInt<16>(Imm);}]
+>;
+
+def UIMM16bit : ImmLeaf <i32,
+  [{return isUInt<16>(Imm);}]
 >;
 
 def i64imm_32bit : ImmLeaf<i64, [{
diff --git a/llvm/lib/Target/AMDGPU/SOPInstructions.td b/llvm/lib/Target/AMDGPU/SOPInstructions.td
index c0e0a368394386..46fa3d57a21cb2 100644
--- a/llvm/lib/Target/AMDGPU/SOPInstructions.td
+++ b/llvm/lib/Target/AMDGPU/SOPInstructions.td
@@ -1124,7 +1124,7 @@ class S_SETREG_B32_Pseudo <list<dag> pattern=[]> : SOPK_Pseudo <
   pattern>;
 
 def S_SETREG_B32 : S_SETREG_B32_Pseudo <
-  [(int_amdgcn_s_setreg (i32 SIMM16bit:$simm16), i32:$sdst)]> {
+  [(int_amdgcn_s_setreg (i32 timm:$simm16), i32:$sdst)]> {
   // Use custom inserter to optimize some cases to
   // S_DENORM_MODE/S_ROUND_MODE/S_SETREG_B32_mode.
   let usesCustomInserter = 1;
diff --git a/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.s.setreg.ll b/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.s.setreg.ll
index 99d80b5dd14b33..d2c14f2401fc35 100644
--- a/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.s.setreg.ll
+++ b/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.s.setreg.ll
@@ -1433,72 +1433,6 @@ define amdgpu_kernel void @test_setreg_set_4_bits_straddles_round_and_denorm() {
   ret void
 }
 
-define amdgpu_ps void @test_63489(i32 inreg %var.mode) {
-; GFX6-LABEL: test_63489:
-; GFX6:       ; %bb.0:
-; GFX6-NEXT:    s_setreg_b32 hwreg(HW_REG_MODE), s0 ; encoding: [0x01,0xf8,0x80,0xb9]
-; GFX6-NEXT:    ;;#ASMSTART
-; GFX6-NEXT:    ;;#ASMEND
-; GFX6-NEXT:    s_endpgm ; encoding: [0x00,0x00,0x81,0xbf]
-;
-; GFX789-LABEL: test_63489:
-; GFX789:       ; %bb.0:
-; GFX789-NEXT:    s_setreg_b32 hwreg(HW_REG_MODE), s0 ; encoding: [0x01,0xf8,0x00,0xb9]
-; GFX789-NEXT:    ;;#ASMSTART
-; GFX789-NEXT:    ;;#ASMEND
-; GFX789-NEXT:    s_endpgm ; encoding: [0x00,0x00,0x81,0xbf]
-;
-; GFX10-LABEL: test_63489:
-; GFX10:       ; %bb.0:
-; GFX10-NEXT:    s_setreg_b32 hwreg(HW_REG_MODE), s0 ; encoding: [0x01,0xf8,0x80,0xb9]
-; GFX10-NEXT:    ;;#ASMSTART
-; GFX10-NEXT:    ;;#ASMEND
-; GFX10-NEXT:    s_endpgm ; encoding: [0x00,0x00,0x81,0xbf]
-;
-; GFX11-LABEL: test_63489:
-; GFX11:       ; %bb.0:
-; GFX11-NEXT:    s_setreg_b32 hwreg(HW_REG_MODE), s0 ; encoding: [0x01,0xf8,0x00,0xb9]
-; GFX11-NEXT:    ;;#ASMSTART
-; GFX11-NEXT:    ;;#ASMEND
-; GFX11-NEXT:    s_endpgm ; encoding: [0x00,0x00,0xb0,0xbf]
-  call void @llvm.amdgcn.s.setreg(i32 63489, i32 %var.mode)
-  call void asm sideeffect "", ""()
-  ret void
-}
-
-define amdgpu_ps void @test_minus_2047(i32 inreg %var.mode) {
-; GFX6-LABEL: test_minus_2047:
-; GFX6:       ; %bb.0:
-; GFX6-NEXT:    s_setreg_b32 hwreg(HW_REG_MODE), s0 ; encoding: [0x01,0xf8,0x80,0xb9]
-; GFX6-NEXT:    ;;#ASMSTART
-; GFX6-NEXT:    ;;#ASMEND
-; GFX6-NEXT:    s_endpgm ; encoding: [0x00,0x00,0x81,0xbf]
-;
-; GFX789-LABEL: test_minus_2047:
-; GFX789:       ; %bb.0:
-; GFX789-NEXT:    s_setreg_b32 hwreg(HW_REG_MODE), s0 ; encoding: [0x01,0xf8,0x00,0xb9]
-; GFX789-NEXT:    ;;#ASMSTART
-; GFX789-NEXT:    ;;#ASMEND
-; GFX789-NEXT:    s_endpgm ; encoding: [0x00,0x00,0x81,0xbf]
-;
-; GFX10-LABEL: test_minus_2047:
-; GFX10:       ; %bb.0:
-; GFX10-NEXT:    s_setreg_b32 hwreg(HW_REG_MODE), s0 ; encoding: [0x01,0xf8,0x80,0xb9]
-; GFX10-NEXT:    ;;#ASMSTART
-; GFX10-NEXT:    ;;#ASMEND
-; GFX10-NEXT:    s_endpgm ; encoding: [0x00,0x00,0x81,0xbf]
-;
-; GFX11-LABEL: test_minus_2047:
-; GFX11:       ; %bb.0:
-; GFX11-NEXT:    s_setreg_b32 hwreg(HW_REG_MODE), s0 ; encoding: [0x01,0xf8,0x00,0xb9]
-; GFX11-NEXT:    ;;#ASMSTART
-; GFX11-NEXT:    ;;#ASMEND
-; GFX11-NEXT:    s_endpgm ; encoding: [0x00,0x00,0xb0,0xbf]
-  call void @llvm.amdgcn.s.setreg(i32 -2047, i32 %var.mode)
-  call void asm sideeffect "", ""()
-  ret void
-}
-
 ; FIXME: Broken for DAG
 ; define void @test_setreg_roundingmode_var_vgpr(i32 %var.mode) {
 ;   call void @llvm.amdgcn.s.setreg(i32 4097, i32 %var.mode)

``````````

</details>


https://github.com/llvm/llvm-project/pull/78372