[GISel][CombinerHelper] Combine and(trunc(x), trunc(y)) -> trunc(and(x, y))

Author: dc03-work

llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp

@@ -3060,6 +3060,7 @@ bool CombinerHelper::matchHoistLogicOpWithSameOpcodeHands(
   MachineInstr *RightHandInst = getDefIgnoringCopies(RHSReg, MRI);
   if (!LeftHandInst || !RightHandInst)
     return false;
+
   unsigned HandOpcode = LeftHandInst->getOpcode();
   if (HandOpcode != RightHandInst->getOpcode())
     return false;
@@ -3083,8 +3084,10 @@ bool CombinerHelper::matchHoistLogicOpWithSameOpcodeHands(
     return false;
   case TargetOpcode::G_ANYEXT:
   case TargetOpcode::G_SEXT:
-  case TargetOpcode::G_ZEXT: {
+  case TargetOpcode::G_ZEXT:
+  case TargetOpcode::G_TRUNC: {
     // Match: logic (ext X), (ext Y) --> ext (logic X, Y)
+    // Match: logic (trunc X), (trunc Y) -> trunc (logic X, Y)
     break;
   }
   case TargetOpcode::G_AND:

llvm/test/CodeGen/AArch64/GlobalISel/combine-and-trunc.mir

@@ -11,11 +11,8 @@ body:             |
     ; CHECK-NEXT: {{  $}}
     ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
     ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s32) = COPY $w1
-    ; CHECK-NEXT: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
-    ; CHECK-NEXT: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
-    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s16) = G_AND [[TRUNC]], [[TRUNC1]]
-    ; CHECK-NEXT: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[AND]](s16)
-    ; CHECK-NEXT: $w0 = COPY [[ANYEXT]](s32)
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY]], [[COPY1]]
+    ; CHECK-NEXT: $w0 = COPY [[AND]](s32)
     %0:_(s32) = COPY $w0
     %1:_(s32) = COPY $w1
     %2:_(s16) = G_TRUNC %0
@@ -88,10 +85,9 @@ body:             |
     ; CHECK-NEXT: {{  $}}
     ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(<4 x s32>) = COPY $q0
     ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(<4 x s32>) = COPY $q1
-    ; CHECK-NEXT: [[TRUNC:%[0-9]+]]:_(<4 x s16>) = G_TRUNC [[COPY]](<4 x s32>)
-    ; CHECK-NEXT: [[TRUNC1:%[0-9]+]]:_(<4 x s16>) = G_TRUNC [[COPY1]](<4 x s32>)
-    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(<4 x s16>) = G_AND [[TRUNC]], [[TRUNC1]]
-    ; CHECK-NEXT: $x0 = COPY [[AND]](<4 x s16>)
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(<4 x s32>) = G_AND [[COPY]], [[COPY1]]
+    ; CHECK-NEXT: [[TRUNC:%[0-9]+]]:_(<4 x s16>) = G_TRUNC [[AND]](<4 x s32>)
+    ; CHECK-NEXT: $x0 = COPY [[TRUNC]](<4 x s16>)
     %0:_(<4 x s32>) = COPY $q0
     %1:_(<4 x s32>) = COPY $q1
     %2:_(<4 x s16>) = G_TRUNC %0

llvm/test/CodeGen/AArch64/GlobalISel/combine-select.mir

@@ -1,7 +1,8 @@
 # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
-# RUN: llc -run-pass=aarch64-prelegalizer-combiner -verify-machineinstrs -mtriple aarch64-unknown- --aarch64postlegalizercombiner-only-enable-rule="select_to_logical" %s -o - | FileCheck %s
+# RUN: llc -run-pass=aarch64-prelegalizer-combiner -verify-machineinstrs -mtriple aarch64-unknown-unknown %s -o - | FileCheck %s
 # RUN: llc -debugify-and-strip-all-safe -run-pass=aarch64-prelegalizer-combiner -verify-machineinstrs -mtriple aarch64-unknown-unknown %s -o - | FileCheck %s
 # REQUIRES: asserts
+
 ---
 # select (c, x, x) -> x
 name:            test_combine_select_same_res

llvm/test/CodeGen/AArch64/GlobalISel/prelegalizer-combiner-narrow-binop-feeding-add.mir

@@ -84,10 +84,9 @@ body:             |
     ; CHECK: liveins: $x0, $x1
     ; CHECK: %binop_lhs:_(s64) = COPY $x0
     ; CHECK: %binop_rhs:_(s64) = COPY $x1
-    ; CHECK: [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC %binop_lhs(s64)
-    ; CHECK: [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC %binop_rhs(s64)
-    ; CHECK: [[AND:%[0-9]+]]:_(s32) = G_AND [[TRUNC]], [[TRUNC1]]
-    ; CHECK: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[AND]](s32)
+    ; CHECK: [[AND:%[0-9]+]]:_(s64) = G_AND %binop_lhs, %binop_rhs
+    ; CHECK: [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[AND]](s64)
+    ; CHECK: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[TRUNC]](s32)
     ; CHECK: $x0 = COPY [[ZEXT]](s64)
     ; CHECK: RET_ReallyLR implicit $x0
     %binop_lhs:_(s64) = COPY $x0
@@ -131,10 +130,9 @@ body:             |
     ; CHECK: liveins: $x0, $x1
     ; CHECK: %binop_lhs:_(s64) = COPY $x0
     ; CHECK: %binop_rhs:_(s64) = COPY $x1
-    ; CHECK: [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC %binop_lhs(s64)
-    ; CHECK: [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC %binop_rhs(s64)
-    ; CHECK: [[XOR:%[0-9]+]]:_(s32) = G_XOR [[TRUNC]], [[TRUNC1]]
-    ; CHECK: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[XOR]](s32)
+    ; CHECK: [[XOR:%[0-9]+]]:_(s64) = G_XOR %binop_lhs, %binop_rhs
+    ; CHECK: [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[XOR]](s64)
+    ; CHECK: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[TRUNC]](s32)
     ; CHECK: $x0 = COPY [[ZEXT]](s64)
     ; CHECK: RET_ReallyLR implicit $x0
     %binop_lhs:_(s64) = COPY $x0

llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-hoist-same-hands.mir

@@ -268,10 +268,9 @@ body:             |
     ; CHECK: liveins: $w0, $w1
     ; CHECK: %x_wide:_(s32) = COPY $w0
     ; CHECK: %y_wide:_(s32) = COPY $w1
-    ; CHECK: %x:_(s1) = G_TRUNC %x_wide(s32)
-    ; CHECK: %y:_(s1) = G_TRUNC %y_wide(s32)
-    ; CHECK: [[OR:%[0-9]+]]:_(s1) = G_OR %x, %y
-    ; CHECK: %logic_op:_(s64) = G_SEXT [[OR]](s1)
+    ; CHECK: %8:_(s32) = G_OR %x_wide, %y_wide
+    ; CHECK: %7:_(s1) = G_TRUNC %8(s32)
+    ; CHECK: %logic_op:_(s64) = G_SEXT %7(s1)
     ; CHECK: $x0 = COPY %logic_op(s64)
     ; CHECK: RET_ReallyLR implicit $x0
     %x_wide:_(s32) = COPY $w0

llvm/test/CodeGen/AArch64/pr58431.ll

@@ -4,7 +4,7 @@
 define i32 @f(i64 %0) {
 ; CHECK-LABEL: f:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    mov w8, #10
+; CHECK-NEXT:    mov w8, #10 // =0xa
 ; CHECK-NEXT:    mov w9, w0
 ; CHECK-NEXT:    udiv x10, x9, x8
 ; CHECK-NEXT:    msub x0, x10, x8, x9

llvm/test/CodeGen/AMDGPU/GlobalISel/fshl.ll

@@ -1804,113 +1804,110 @@ define i24 @v_fshl_i24(i24 %lhs, i24 %rhs, i24 %amt) {
 define amdgpu_ps i48 @s_fshl_v2i24(i48 inreg %lhs.arg, i48 inreg %rhs.arg, i48 inreg %amt.arg) {
 ; GFX6-LABEL: s_fshl_v2i24:
 ; GFX6:       ; %bb.0:
+; GFX6-NEXT:    v_cvt_f32_ubyte0_e32 v2, 24
+; GFX6-NEXT:    v_rcp_iflag_f32_e32 v2, v2
 ; GFX6-NEXT:    s_lshr_b32 s6, s0, 16
-; GFX6-NEXT:    s_lshr_b32 s7, s0, 24
-; GFX6-NEXT:    s_and_b32 s9, s0, 0xff
-; GFX6-NEXT:    s_bfe_u32 s0, s0, 0x80008
-; GFX6-NEXT:    v_cvt_f32_ubyte0_e32 v0, 24
-; GFX6-NEXT:    s_lshl_b32 s0, s0, 8
+; GFX6-NEXT:    s_lshr_b32 s7, s1, 8
+; GFX6-NEXT:    s_bfe_u32 s9, s0, 0x80008
+; GFX6-NEXT:    v_mul_f32_e32 v2, 0x4f7ffffe, v2
+; GFX6-NEXT:    v_cvt_u32_f32_e32 v2, v2
+; GFX6-NEXT:    s_and_b32 s8, s0, 0xff
+; GFX6-NEXT:    s_lshl_b32 s9, s9, 8
 ; GFX6-NEXT:    s_and_b32 s6, s6, 0xff
-; GFX6-NEXT:    v_rcp_iflag_f32_e32 v0, v0
-; GFX6-NEXT:    s_or_b32 s0, s9, s0
+; GFX6-NEXT:    s_and_b32 s1, s1, 0xff
+; GFX6-NEXT:    v_mov_b32_e32 v0, s0
+; GFX6-NEXT:    s_and_b32 s0, s7, 0xff
+; GFX6-NEXT:    s_or_b32 s8, s8, s9
 ; GFX6-NEXT:    s_and_b32 s6, 0xffff, s6
-; GFX6-NEXT:    s_lshr_b32 s8, s1, 8
+; GFX6-NEXT:    v_alignbit_b32 v0, s1, v0, 24
 ; GFX6-NEXT:    s_and_b32 s0, 0xffff, s0
+; GFX6-NEXT:    s_and_b32 s8, 0xffff, s8
 ; GFX6-NEXT:    s_lshl_b32 s6, s6, 16
+; GFX6-NEXT:    v_and_b32_e32 v0, 0xffff, v0
+; GFX6-NEXT:    s_lshl_b32 s0, s0, 16
+; GFX6-NEXT:    v_mov_b32_e32 v3, 0xffffffe8
+; GFX6-NEXT:    s_or_b32 s6, s8, s6
+; GFX6-NEXT:    v_or_b32_e32 v0, s0, v0
+; GFX6-NEXT:    s_lshr_b32 s0, s2, 16
+; GFX6-NEXT:    s_lshr_b32 s1, s3, 8
+; GFX6-NEXT:    s_bfe_u32 s8, s2, 0x80008
+; GFX6-NEXT:    v_mul_lo_u32 v3, v2, v3
+; GFX6-NEXT:    s_and_b32 s7, s2, 0xff
+; GFX6-NEXT:    s_lshl_b32 s8, s8, 8
+; GFX6-NEXT:    s_and_b32 s0, s0, 0xff
+; GFX6-NEXT:    s_and_b32 s3, s3, 0xff
+; GFX6-NEXT:    v_mov_b32_e32 v1, s2
 ; GFX6-NEXT:    s_and_b32 s1, s1, 0xff
-; GFX6-NEXT:    s_or_b32 s0, s0, s6
-; GFX6-NEXT:    s_lshl_b32 s1, s1, 8
-; GFX6-NEXT:    s_and_b32 s6, s8, 0xff
-; GFX6-NEXT:    s_or_b32 s1, s7, s1
-; GFX6-NEXT:    s_and_b32 s6, 0xffff, s6
-; GFX6-NEXT:    v_mul_f32_e32 v0, 0x4f7ffffe, v0
+; GFX6-NEXT:    s_or_b32 s7, s7, s8
+; GFX6-NEXT:    s_and_b32 s0, 0xffff, s0
+; GFX6-NEXT:    v_alignbit_b32 v1, s3, v1, 24
+; GFX6-NEXT:    s_and_b32 s1, 0xffff, s1
+; GFX6-NEXT:    s_and_b32 s7, 0xffff, s7
+; GFX6-NEXT:    s_lshl_b32 s0, s0, 16
+; GFX6-NEXT:    v_and_b32_e32 v1, 0xffff, v1
+; GFX6-NEXT:    s_lshl_b32 s1, s1, 16
+; GFX6-NEXT:    s_or_b32 s0, s7, s0
+; GFX6-NEXT:    v_or_b32_e32 v1, s1, v1
+; GFX6-NEXT:    s_lshr_b32 s1, s4, 16
+; GFX6-NEXT:    s_bfe_u32 s7, s4, 0x80008
+; GFX6-NEXT:    v_mul_hi_u32 v3, v2, v3
+; GFX6-NEXT:    s_and_b32 s3, s4, 0xff
+; GFX6-NEXT:    s_lshl_b32 s7, s7, 8
+; GFX6-NEXT:    s_and_b32 s1, s1, 0xff
+; GFX6-NEXT:    s_or_b32 s3, s3, s7
 ; GFX6-NEXT:    s_and_b32 s1, 0xffff, s1
-; GFX6-NEXT:    s_lshl_b32 s6, s6, 16
-; GFX6-NEXT:    v_cvt_u32_f32_e32 v0, v0
-; GFX6-NEXT:    s_or_b32 s1, s1, s6
-; GFX6-NEXT:    s_lshr_b32 s6, s2, 16
-; GFX6-NEXT:    s_lshr_b32 s7, s2, 24
-; GFX6-NEXT:    s_and_b32 s9, s2, 0xff
-; GFX6-NEXT:    s_bfe_u32 s2, s2, 0x80008
-; GFX6-NEXT:    s_lshl_b32 s2, s2, 8
-; GFX6-NEXT:    s_and_b32 s6, s6, 0xff
-; GFX6-NEXT:    s_or_b32 s2, s9, s2
-; GFX6-NEXT:    s_and_b32 s6, 0xffff, s6
-; GFX6-NEXT:    v_mov_b32_e32 v1, 0xffffffe8
-; GFX6-NEXT:    s_lshr_b32 s8, s3, 8
-; GFX6-NEXT:    s_and_b32 s2, 0xffff, s2
-; GFX6-NEXT:    s_lshl_b32 s6, s6, 16
-; GFX6-NEXT:    s_and_b32 s3, s3, 0xff
-; GFX6-NEXT:    v_mul_lo_u32 v1, v0, v1
-; GFX6-NEXT:    s_or_b32 s2, s2, s6
-; GFX6-NEXT:    s_lshl_b32 s3, s3, 8
-; GFX6-NEXT:    s_and_b32 s6, s8, 0xff
-; GFX6-NEXT:    s_or_b32 s3, s7, s3
-; GFX6-NEXT:    s_and_b32 s6, 0xffff, s6
 ; GFX6-NEXT:    s_and_b32 s3, 0xffff, s3
-; GFX6-NEXT:    s_lshl_b32 s6, s6, 16
-; GFX6-NEXT:    s_or_b32 s3, s3, s6
-; GFX6-NEXT:    s_lshr_b32 s6, s4, 16
-; GFX6-NEXT:    s_lshr_b32 s7, s4, 24
-; GFX6-NEXT:    s_and_b32 s9, s4, 0xff
-; GFX6-NEXT:    s_bfe_u32 s4, s4, 0x80008
-; GFX6-NEXT:    v_mul_hi_u32 v1, v0, v1
-; GFX6-NEXT:    s_lshl_b32 s4, s4, 8
-; GFX6-NEXT:    s_and_b32 s6, s6, 0xff
-; GFX6-NEXT:    s_or_b32 s4, s9, s4
-; GFX6-NEXT:    s_and_b32 s6, 0xffff, s6
-; GFX6-NEXT:    s_and_b32 s4, 0xffff, s4
-; GFX6-NEXT:    s_lshl_b32 s6, s6, 16
-; GFX6-NEXT:    s_or_b32 s4, s4, s6
-; GFX6-NEXT:    v_add_i32_e32 v0, vcc, v0, v1
-; GFX6-NEXT:    v_mul_hi_u32 v1, s4, v0
-; GFX6-NEXT:    s_lshr_b32 s8, s5, 8
-; GFX6-NEXT:    s_and_b32 s5, s5, 0xff
-; GFX6-NEXT:    s_lshl_b32 s5, s5, 8
-; GFX6-NEXT:    v_mul_lo_u32 v1, v1, 24
-; GFX6-NEXT:    s_and_b32 s6, s8, 0xff
-; GFX6-NEXT:    s_or_b32 s5, s7, s5
-; GFX6-NEXT:    s_and_b32 s6, 0xffff, s6
-; GFX6-NEXT:    s_and_b32 s5, 0xffff, s5
-; GFX6-NEXT:    s_lshl_b32 s6, s6, 16
-; GFX6-NEXT:    s_or_b32 s5, s5, s6
-; GFX6-NEXT:    v_sub_i32_e32 v1, vcc, s4, v1
-; GFX6-NEXT:    v_subrev_i32_e32 v2, vcc, 24, v1
-; GFX6-NEXT:    v_mul_hi_u32 v0, s5, v0
-; GFX6-NEXT:    v_cmp_le_u32_e32 vcc, 24, v1
-; GFX6-NEXT:    v_cndmask_b32_e32 v1, v1, v2, vcc
-; GFX6-NEXT:    v_subrev_i32_e32 v2, vcc, 24, v1
-; GFX6-NEXT:    v_cmp_le_u32_e32 vcc, 24, v1
-; GFX6-NEXT:    v_mul_lo_u32 v0, v0, 24
-; GFX6-NEXT:    v_cndmask_b32_e32 v1, v1, v2, vcc
-; GFX6-NEXT:    v_sub_i32_e32 v2, vcc, 23, v1
-; GFX6-NEXT:    v_and_b32_e32 v1, 0xffffff, v1
-; GFX6-NEXT:    v_lshl_b32_e32 v1, s0, v1
-; GFX6-NEXT:    s_lshr_b32 s0, s2, 1
+; GFX6-NEXT:    s_lshl_b32 s1, s1, 16
+; GFX6-NEXT:    s_or_b32 s1, s3, s1
+; GFX6-NEXT:    v_add_i32_e32 v2, vcc, v2, v3
+; GFX6-NEXT:    v_mul_hi_u32 v3, s1, v2
+; GFX6-NEXT:    s_lshr_b32 s2, s5, 8
+; GFX6-NEXT:    s_and_b32 s3, s5, 0xff
+; GFX6-NEXT:    v_mov_b32_e32 v4, s4
+; GFX6-NEXT:    s_and_b32 s2, s2, 0xff
+; GFX6-NEXT:    v_alignbit_b32 v4, s3, v4, 24
+; GFX6-NEXT:    s_and_b32 s2, 0xffff, s2
+; GFX6-NEXT:    v_and_b32_e32 v4, 0xffff, v4
+; GFX6-NEXT:    v_mul_lo_u32 v3, v3, 24
+; GFX6-NEXT:    s_lshl_b32 s2, s2, 16
+; GFX6-NEXT:    v_or_b32_e32 v4, s2, v4
+; GFX6-NEXT:    v_mul_hi_u32 v2, v4, v2
+; GFX6-NEXT:    v_sub_i32_e32 v3, vcc, s1, v3
+; GFX6-NEXT:    v_subrev_i32_e32 v5, vcc, 24, v3
+; GFX6-NEXT:    v_cmp_le_u32_e32 vcc, 24, v3
+; GFX6-NEXT:    v_mul_lo_u32 v2, v2, 24
+; GFX6-NEXT:    v_cndmask_b32_e32 v3, v3, v5, vcc
+; GFX6-NEXT:    v_subrev_i32_e32 v5, vcc, 24, v3
+; GFX6-NEXT:    v_cmp_le_u32_e32 vcc, 24, v3
+; GFX6-NEXT:    v_cndmask_b32_e32 v3, v3, v5, vcc
+; GFX6-NEXT:    v_sub_i32_e32 v2, vcc, v4, v2
+; GFX6-NEXT:    v_sub_i32_e32 v5, vcc, 23, v3
+; GFX6-NEXT:    v_subrev_i32_e32 v4, vcc, 24, v2
+; GFX6-NEXT:    v_cmp_le_u32_e32 vcc, 24, v2
+; GFX6-NEXT:    v_cndmask_b32_e32 v2, v2, v4, vcc
+; GFX6-NEXT:    v_subrev_i32_e32 v4, vcc, 24, v2
+; GFX6-NEXT:    v_cmp_le_u32_e32 vcc, 24, v2
+; GFX6-NEXT:    v_and_b32_e32 v3, 0xffffff, v3
+; GFX6-NEXT:    s_lshr_b32 s0, s0, 1
+; GFX6-NEXT:    v_and_b32_e32 v5, 0xffffff, v5
+; GFX6-NEXT:    v_cndmask_b32_e32 v2, v2, v4, vcc
+; GFX6-NEXT:    v_lshl_b32_e32 v3, s6, v3
+; GFX6-NEXT:    v_lshr_b32_e32 v5, s0, v5
+; GFX6-NEXT:    v_sub_i32_e32 v4, vcc, 23, v2
 ; GFX6-NEXT:    v_and_b32_e32 v2, 0xffffff, v2
-; GFX6-NEXT:    v_lshr_b32_e32 v2, s0, v2
-; GFX6-NEXT:    v_sub_i32_e32 v0, vcc, s5, v0
+; GFX6-NEXT:    v_or_b32_e32 v3, v3, v5
+; GFX6-NEXT:    v_lshlrev_b32_e32 v0, v2, v0
+; GFX6-NEXT:    v_lshrrev_b32_e32 v1, 1, v1
+; GFX6-NEXT:    v_and_b32_e32 v2, 0xffffff, v4
+; GFX6-NEXT:    v_lshrrev_b32_e32 v1, v2, v1
+; GFX6-NEXT:    v_bfe_u32 v2, v3, 8, 8
+; GFX6-NEXT:    v_or_b32_e32 v0, v0, v1
+; GFX6-NEXT:    v_and_b32_e32 v1, 0xff, v3
+; GFX6-NEXT:    v_lshlrev_b32_e32 v2, 8, v2
+; GFX6-NEXT:    v_or_b32_e32 v1, v1, v2
+; GFX6-NEXT:    v_bfe_u32 v2, v3, 16, 8
+; GFX6-NEXT:    v_lshlrev_b32_e32 v2, 16, v2
 ; GFX6-NEXT:    v_or_b32_e32 v1, v1, v2
-; GFX6-NEXT:    v_subrev_i32_e32 v2, vcc, 24, v0
-; GFX6-NEXT:    v_cmp_le_u32_e32 vcc, 24, v0
-; GFX6-NEXT:    v_cndmask_b32_e32 v0, v0, v2, vcc
-; GFX6-NEXT:    v_subrev_i32_e32 v2, vcc, 24, v0
-; GFX6-NEXT:    v_cmp_le_u32_e32 vcc, 24, v0
-; GFX6-NEXT:    v_cndmask_b32_e32 v0, v0, v2, vcc
-; GFX6-NEXT:    v_sub_i32_e32 v2, vcc, 23, v0
-; GFX6-NEXT:    v_and_b32_e32 v0, 0xffffff, v0
-; GFX6-NEXT:    s_lshr_b32 s0, s3, 1
-; GFX6-NEXT:    v_and_b32_e32 v2, 0xffffff, v2
-; GFX6-NEXT:    v_lshl_b32_e32 v0, s1, v0
-; GFX6-NEXT:    v_lshr_b32_e32 v2, s0, v2
-; GFX6-NEXT:    v_bfe_u32 v3, v1, 8, 8
-; GFX6-NEXT:    v_or_b32_e32 v0, v0, v2
-; GFX6-NEXT:    v_and_b32_e32 v2, 0xff, v1
-; GFX6-NEXT:    v_lshlrev_b32_e32 v3, 8, v3
-; GFX6-NEXT:    v_bfe_u32 v1, v1, 16, 8
-; GFX6-NEXT:    v_or_b32_e32 v2, v2, v3
-; GFX6-NEXT:    v_lshlrev_b32_e32 v1, 16, v1
-; GFX6-NEXT:    v_or_b32_e32 v1, v2, v1
 ; GFX6-NEXT:    v_and_b32_e32 v2, 0xff, v0
 ; GFX6-NEXT:    v_lshlrev_b32_e32 v2, 24, v2
 ; GFX6-NEXT:    v_or_b32_e32 v1, v1, v2