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authorMatt Arsenault <Matthew.Arsenault@amd.com>2018-10-22 16:27:27 +0000
committerMatt Arsenault <Matthew.Arsenault@amd.com>2018-10-22 16:27:27 +0000
commit687ec75d10bd860edb194d88d5438dcb1bc6eb92 (patch)
tree89cfd5a61dee8ea2ffaadea0623d22eb28a86278 /llvm/test/CodeGen/AMDGPU/fmax3.ll
parentb96181c2bf1d068824c6fd635c0921d0ffd20187 (diff)
downloadbcm5719-llvm-687ec75d10bd860edb194d88d5438dcb1bc6eb92.tar.gz
bcm5719-llvm-687ec75d10bd860edb194d88d5438dcb1bc6eb92.zip
DAG: Change behavior of fminnum/fmaxnum nodes
Introduce new versions that follow the IEEE semantics to help with legalization that may need quieted inputs. There are some regressions from inserting unnecessary canonicalizes when these are matched from fast math fcmp + select which should be fixed in a future commit. llvm-svn: 344914
Diffstat (limited to 'llvm/test/CodeGen/AMDGPU/fmax3.ll')
-rw-r--r--llvm/test/CodeGen/AMDGPU/fmax3.ll44
1 files changed, 27 insertions, 17 deletions
diff --git a/llvm/test/CodeGen/AMDGPU/fmax3.ll b/llvm/test/CodeGen/AMDGPU/fmax3.ll
index 1f67ace72df..5a92eac7f32 100644
--- a/llvm/test/CodeGen/AMDGPU/fmax3.ll
+++ b/llvm/test/CodeGen/AMDGPU/fmax3.ll
@@ -48,8 +48,11 @@ define amdgpu_kernel void @test_fmax3_olt_1_f32(float addrspace(1)* %out, float
; SI: v_max3_f32 [[RESULT_F32:v[0-9]+]], [[CVT_A]], [[CVT_B]], [[CVT_C]]
; SI: v_cvt_f16_f32_e32 [[RESULT:v[0-9]+]], [[RESULT_F32]]
-; VI: v_max_f16_e32
-; VI: v_max_f16_e32 [[RESULT:v[0-9]+]],
+; VI-DAG: v_max_f16_e32 [[QUIET_A:v[0-9]+]], [[REGA]], [[REGA]]
+; VI-DAG: v_max_f16_e32 [[QUIET_B:v[0-9]+]], [[REGB]], [[REGB]]
+; VI: v_max_f16_e32 [[MAX0:v[0-9]+]], [[QUIET_A]], [[QUIET_B]]
+; VI: v_max_f16_e32 [[QUIET_C:v[0-9]+]], [[REGC]], [[REGC]]
+; VI: v_max_f16_e32 [[RESULT:v[0-9]+]], [[MAX0]], [[QUIET_C]]
; GFX9: v_max3_f16 [[RESULT:v[0-9]+]], [[REGA]], [[REGB]], [[REGC]]
; GCN: buffer_store_short [[RESULT]],
@@ -75,8 +78,11 @@ define amdgpu_kernel void @test_fmax3_olt_0_f16(half addrspace(1)* %out, half ad
; SI: v_max3_f32 [[RESULT_F32:v[0-9]+]], [[CVT_C]], [[CVT_A]], [[CVT_B]]
; SI: v_cvt_f16_f32_e32 [[RESULT:v[0-9]+]], [[RESULT_F32]]
-; VI: v_max_f16_e32
-; VI: v_max_f16_e32 [[RESULT:v[0-9]+]],
+; VI-DAG: v_max_f16_e32 [[QUIET_A:v[0-9]+]], [[REGA]], [[REGA]]
+; VI-DAG: v_max_f16_e32 [[QUIET_B:v[0-9]+]], [[REGB]], [[REGB]]
+; VI: v_max_f16_e32 [[MAX0:v[0-9]+]], [[QUIET_A]], [[QUIET_B]]
+; VI: v_max_f16_e32 [[QUIET_C:v[0-9]+]], [[REGC]], [[REGC]]
+; VI: v_max_f16_e32 [[RESULT:v[0-9]+]], [[QUIET_C]], [[MAX0]]
; GFX9: v_max3_f16 [[RESULT:v[0-9]+]], [[REGC]], [[REGA]], [[REGB]]
; GCN: buffer_store_short [[RESULT]],
@@ -100,22 +106,25 @@ define amdgpu_kernel void @test_fmax3_olt_1_f16(half addrspace(1)* %out, half ad
; SI-NEXT: v_max3_f32
; SI-NEXT: v_max3_f32
-; VI: v_max_f16_sdwa v4, v0, v1 dst_sel:DWORD dst_unused:UNUSED_PAD src0_sel:WORD_1 src1_sel:WORD_1
-; VI: v_max_f16_e32 v0, v0, v1
-; VI: v_max_f16_sdwa v1, v2, v4 dst_sel:DWORD dst_unused:UNUSED_PAD src0_sel:WORD_1 src1_sel:DWORD
-; VI: v_max_f16_e32 v0, v2, v0
-; VI: v_max_f16_sdwa v1, v1, v3 dst_sel:WORD_1 dst_unused:UNUSED_PAD src0_sel:DWORD src1_sel:WORD_1
-; VI: v_max_f16_e32 v0, v0, v3
-; VI: v_or_b32_e32 v0, v0, v1
-
-; GFX9: v_pk_max_f16
+; VI: s_waitcnt
+; VI-NEXT: v_max_f16_sdwa v4, v0, v1 dst_sel:DWORD dst_unused:UNUSED_PAD src0_sel:WORD_1 src1_sel:WORD_1
+; VI-NEXT: v_max_f16_e32 v0, v0, v1
+; VI-NEXT: v_max_f16_sdwa v1, v2, v4 dst_sel:DWORD dst_unused:UNUSED_PAD src0_sel:WORD_1 src1_sel:DWORD
+; VI-NEXT: v_max_f16_e32 v0, v2, v0
+; VI-NEXT: v_max_f16_sdwa v1, v1, v3 dst_sel:WORD_1 dst_unused:UNUSED_PAD src0_sel:DWORD src1_sel:WORD_1
+; VI-NEXT: v_max_f16_e32 v0, v0, v3
+; VI-NEXT: v_or_b32_sdwa v0, v0, v1 dst_sel:DWORD dst_unused:UNUSED_PAD src0_sel:WORD_0 src1_sel:DWORD
+; VI-NEXT: s_setpc_b64
+
+; GFX9: s_waitcnt
+; GFX9-NEXT: v_pk_max_f16
; GFX9-NEXT: v_pk_max_f16
; GFX9-NEXT: v_pk_max_f16
-define <2 x half> @no_fmax3_v2f16(<2 x half> %a, <2 x half> %b, <2 x half> %c, <2 x half> %d) {
+define <2 x half> @no_fmax3_v2f16(<2 x half> %a, <2 x half> %b, <2 x half> %c, <2 x half> %d) #2 {
entry:
- %max = tail call fast <2 x half> @llvm.maxnum.v2f16(<2 x half> %a, <2 x half> %b)
- %max1 = tail call fast <2 x half> @llvm.maxnum.v2f16(<2 x half> %c, <2 x half> %max)
- %res = tail call fast <2 x half> @llvm.maxnum.v2f16(<2 x half> %max1, <2 x half> %d)
+ %max = call <2 x half> @llvm.maxnum.v2f16(<2 x half> %a, <2 x half> %b)
+ %max1 = call <2 x half> @llvm.maxnum.v2f16(<2 x half> %c, <2 x half> %max)
+ %res = call <2 x half> @llvm.maxnum.v2f16(<2 x half> %max1, <2 x half> %d)
ret <2 x half> %res
}
@@ -126,3 +135,4 @@ declare <2 x half> @llvm.maxnum.v2f16(<2 x half>, <2 x half>)
attributes #0 = { nounwind }
attributes #1 = { nounwind readnone speculatable }
+attributes #2 = { nounwind "no-nans-fp-math"="true" }
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