Precommit test for D150447.

Author: JonPsson

llvm/test/CodeGen/AMDGPU/loop_exit_with_xor.ll

@@ -1,17 +1,40 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
 ; RUN: llc -mtriple=amdgcn--amdpal -mcpu=gfx803 -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
 
 ; Where the mask of lanes wanting to exit the loop on this iteration is not
 ; obviously already masked by exec (in this case, the xor with -1 inserted by
 ; control flow annotation), then lower control flow must insert an S_AND_B64
 ; with exec.
 
-; GCN-LABEL: {{^}}needs_and:
-
-; GCN: s_or_b64 exec, exec, [[REG1:[^ ,]*]]
-; GCN: s_andn2_b64 exec, exec, [[REG2:[^ ,]*]]
-; GCN: s_or_b64 [[REG2:[^ ,]*]], [[REG1:[^ ,]*]], [[REG2:[^ ,]*]]
-; GCN: s_or_b64 exec, exec, [[REG2:[^ ,]*]]
 define void @needs_and(i32 %arg) {
+; GCN-LABEL: needs_and:
+; GCN:       ; %bb.0: ; %entry
+; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT:    s_mov_b32 s8, 1
+; GCN-NEXT:    s_mov_b64 s[6:7], 0
+; GCN-NEXT:    s_branch .LBB0_2
+; GCN-NEXT:  .LBB0_1: ; %endif
+; GCN-NEXT:    ; in Loop: Header=BB0_2 Depth=1
+; GCN-NEXT:    s_or_b64 exec, exec, s[4:5]
+; GCN-NEXT:    s_add_i32 s8, s8, 1
+; GCN-NEXT:    s_andn2_b64 exec, exec, s[6:7]
+; GCN-NEXT:    s_cbranch_execz .LBB0_4
+; GCN-NEXT:  .LBB0_2: ; %loop
+; GCN-NEXT:    ; =>This Inner Loop Header: Depth=1
+; GCN-NEXT:    v_cmp_le_u32_e64 s[4:5], s8, v0
+; GCN-NEXT:    v_cmp_gt_u32_e32 vcc, s8, v0
+; GCN-NEXT:    s_or_b64 s[6:7], s[4:5], s[6:7]
+; GCN-NEXT:    s_and_saveexec_b64 s[4:5], vcc
+; GCN-NEXT:    s_cbranch_execz .LBB0_1
+; GCN-NEXT:  ; %bb.3: ; %then
+; GCN-NEXT:    ; in Loop: Header=BB0_2 Depth=1
+; GCN-NEXT:    s_nop 0
+; GCN-NEXT:    buffer_store_dword v0, off, s[4:7], s4
+; GCN-NEXT:    s_branch .LBB0_1
+; GCN-NEXT:  .LBB0_4: ; %loopexit
+; GCN-NEXT:    s_or_b64 exec, exec, s[6:7]
+; GCN-NEXT:    s_waitcnt vmcnt(0)
+; GCN-NEXT:    s_setpc_b64 s[30:31]
 entry:
   br label %loop
 
@@ -36,12 +59,24 @@ loopexit:
 ; obviously already masked by exec (a V_CMP), then lower control flow can omit
 ; the S_AND_B64 to avoid an unnecessary instruction.
 
-; GCN-LABEL: {{^}}doesnt_need_and:
-; GCN: v_cmp{{[^ ]*}} [[REG1:[^ ,]*]]
-; GCN: s_or_b64 [[REG2:[^ ,]*]], [[REG1]],
-; GCN: s_andn2_b64 exec, exec, [[REG2]]
-
 define void @doesnt_need_and(i32 %arg) {
+; GCN-LABEL: doesnt_need_and:
+; GCN:       ; %bb.0: ; %entry
+; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT:    s_mov_b32 s6, 0
+; GCN-NEXT:    s_mov_b64 s[4:5], 0
+; GCN-NEXT:  .LBB1_1: ; %loop
+; GCN-NEXT:    ; =>This Inner Loop Header: Depth=1
+; GCN-NEXT:    s_add_i32 s6, s6, 1
+; GCN-NEXT:    v_cmp_le_u32_e32 vcc, s6, v0
+; GCN-NEXT:    s_or_b64 s[4:5], vcc, s[4:5]
+; GCN-NEXT:    buffer_store_dword v0, off, s[4:7], s4
+; GCN-NEXT:    s_andn2_b64 exec, exec, s[4:5]
+; GCN-NEXT:    s_cbranch_execnz .LBB1_1
+; GCN-NEXT:  ; %bb.2: ; %loopexit
+; GCN-NEXT:    s_or_b64 exec, exec, s[4:5]
+; GCN-NEXT:    s_waitcnt vmcnt(0)
+; GCN-NEXT:    s_setpc_b64 s[30:31]
 entry:
   br label %loop
 
@@ -59,13 +94,37 @@ loopexit:
 ; Another case where the mask of lanes wanting to exit the loop is not masked
 ; by exec, because it is a function parameter.
 
-; GCN-LABEL: {{^}}break_cond_is_arg:
-; GCN: s_xor_b64 [[REG1:[^ ,]*]], {{[^ ,]*, -1$}}
-; GCN: s_andn2_b64 exec, exec, [[REG3:[^ ,]*]]
-; GCN: s_and_b64 [[REG2:[^ ,]*]], exec, [[REG1]]
-; GCN: s_or_b64 [[REG3]], [[REG2]],
-
 define void @break_cond_is_arg(i32 %arg, i1 %breakcond) {
+; GCN-LABEL: break_cond_is_arg:
+; GCN:       ; %bb.0: ; %entry
+; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT:    v_and_b32_e32 v1, 1, v1
+; GCN-NEXT:    v_cmp_eq_u32_e32 vcc, 1, v1
+; GCN-NEXT:    s_xor_b64 s[4:5], vcc, -1
+; GCN-NEXT:    s_mov_b32 s10, 1
+; GCN-NEXT:    s_mov_b64 s[6:7], 0
+; GCN-NEXT:    s_branch .LBB2_2
+; GCN-NEXT:  .LBB2_1: ; %endif
+; GCN-NEXT:    ; in Loop: Header=BB2_2 Depth=1
+; GCN-NEXT:    s_or_b64 exec, exec, s[8:9]
+; GCN-NEXT:    s_add_i32 s10, s10, 1
+; GCN-NEXT:    s_andn2_b64 exec, exec, s[6:7]
+; GCN-NEXT:    s_cbranch_execz .LBB2_4
+; GCN-NEXT:  .LBB2_2: ; %loop
+; GCN-NEXT:    ; =>This Inner Loop Header: Depth=1
+; GCN-NEXT:    s_and_b64 s[8:9], exec, s[4:5]
+; GCN-NEXT:    s_or_b64 s[6:7], s[8:9], s[6:7]
+; GCN-NEXT:    v_cmp_gt_u32_e32 vcc, s10, v0
+; GCN-NEXT:    s_and_saveexec_b64 s[8:9], vcc
+; GCN-NEXT:    s_cbranch_execz .LBB2_1
+; GCN-NEXT:  ; %bb.3: ; %then
+; GCN-NEXT:    ; in Loop: Header=BB2_2 Depth=1
+; GCN-NEXT:    buffer_store_dword v0, off, s[4:7], s4
+; GCN-NEXT:    s_branch .LBB2_1
+; GCN-NEXT:  .LBB2_4: ; %loopexit
+; GCN-NEXT:    s_or_b64 exec, exec, s[6:7]
+; GCN-NEXT:    s_waitcnt vmcnt(0)
+; GCN-NEXT:    s_setpc_b64 s[30:31]
 entry:
   br label %loop