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[NVPTX] Check 'contract' fast-math flag in addition to global options (#131372)
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3 files changed

+179
-176
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3 files changed

+179
-176
lines changed

‎llvm/lib/Target/NVPTX/NVPTXISelLowering.cpp

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -4950,7 +4950,9 @@ PerformFADDCombineWithOperands(SDNode *N, SDValue N0, SDValue N1,
49504950
if (N0.getOpcode() == ISD::FMUL) {
49514951
const auto *TLI = static_cast<const NVPTXTargetLowering *>(
49524952
&DCI.DAG.getTargetLoweringInfo());
4953-
if (!TLI->allowFMA(DCI.DAG.getMachineFunction(), OptLevel))
4953+
if (!(TLI->allowFMA(DCI.DAG.getMachineFunction(), OptLevel) ||
4954+
(N->getFlags().hasAllowContract() &&
4955+
N0->getFlags().hasAllowContract())))
49544956
return SDValue();
49554957

49564958
// For floating point:

‎llvm/lib/Target/NVPTX/NVPTXInstrInfo.td

Lines changed: 81 additions & 161 deletions
Original file line numberDiff line numberDiff line change
@@ -150,8 +150,6 @@ def doRsqrtOpt : Predicate<"doRsqrtOpt()">;
150150

151151
def doMulWide : Predicate<"doMulWide">;
152152

153-
def allowFMA : Predicate<"allowFMA()">;
154-
def noFMA : Predicate<"!allowFMA()">;
155153
def allowUnsafeFPMath : Predicate<"allowUnsafeFPMath()">;
156154
def noUnsafeFPMath : Predicate<"!allowUnsafeFPMath()">;
157155

@@ -367,167 +365,89 @@ multiclass FMINIMUMMAXIMUM<string OpcStr, bit NaN, SDNode OpNode> {
367365
// This multiclass should be used for nodes that can be folded to make fma ops.
368366
// In this case, we use the ".rn" variant when FMA is disabled, as this behaves
369367
// just like the non ".rn" op, but prevents ptxas from creating FMAs.
370-
multiclass F3_fma_component<string OpcStr, SDNode OpNode> {
371-
def f64rr :
372-
NVPTXInst<(outs Float64Regs:$dst),
373-
(ins Float64Regs:$a, Float64Regs:$b),
374-
!strconcat(OpcStr, ".f64 \t$dst, $a, $b;"),
375-
[(set f64:$dst, (OpNode f64:$a, f64:$b))]>,
376-
Requires<[allowFMA]>;
377-
def f64ri :
378-
NVPTXInst<(outs Float64Regs:$dst),
379-
(ins Float64Regs:$a, f64imm:$b),
380-
!strconcat(OpcStr, ".f64 \t$dst, $a, $b;"),
381-
[(set f64:$dst, (OpNode f64:$a, fpimm:$b))]>,
382-
Requires<[allowFMA]>;
383-
def f32rr_ftz :
384-
NVPTXInst<(outs Float32Regs:$dst),
385-
(ins Float32Regs:$a, Float32Regs:$b),
386-
!strconcat(OpcStr, ".ftz.f32 \t$dst, $a, $b;"),
387-
[(set f32:$dst, (OpNode f32:$a, f32:$b))]>,
388-
Requires<[allowFMA, doF32FTZ]>;
389-
def f32ri_ftz :
390-
NVPTXInst<(outs Float32Regs:$dst),
391-
(ins Float32Regs:$a, f32imm:$b),
392-
!strconcat(OpcStr, ".ftz.f32 \t$dst, $a, $b;"),
393-
[(set f32:$dst, (OpNode f32:$a, fpimm:$b))]>,
394-
Requires<[allowFMA, doF32FTZ]>;
395-
def f32rr :
396-
NVPTXInst<(outs Float32Regs:$dst),
397-
(ins Float32Regs:$a, Float32Regs:$b),
398-
!strconcat(OpcStr, ".f32 \t$dst, $a, $b;"),
399-
[(set f32:$dst, (OpNode f32:$a, f32:$b))]>,
400-
Requires<[allowFMA]>;
401-
def f32ri :
402-
NVPTXInst<(outs Float32Regs:$dst),
403-
(ins Float32Regs:$a, f32imm:$b),
404-
!strconcat(OpcStr, ".f32 \t$dst, $a, $b;"),
405-
[(set f32:$dst, (OpNode f32:$a, fpimm:$b))]>,
406-
Requires<[allowFMA]>;
407-
408-
def f16rr_ftz :
409-
NVPTXInst<(outs Int16Regs:$dst),
410-
(ins Int16Regs:$a, Int16Regs:$b),
411-
!strconcat(OpcStr, ".ftz.f16 \t$dst, $a, $b;"),
412-
[(set f16:$dst, (OpNode f16:$a, f16:$b))]>,
413-
Requires<[useFP16Math, allowFMA, doF32FTZ]>;
414-
def f16rr :
415-
NVPTXInst<(outs Int16Regs:$dst),
416-
(ins Int16Regs:$a, Int16Regs:$b),
417-
!strconcat(OpcStr, ".f16 \t$dst, $a, $b;"),
418-
[(set f16:$dst, (OpNode f16:$a, f16:$b))]>,
419-
Requires<[useFP16Math, allowFMA]>;
368+
multiclass F3<string op_str, SDPatternOperator op_pat> {
369+
def f64rr :
370+
NVPTXInst<(outs Float64Regs:$dst),
371+
(ins Float64Regs:$a, Float64Regs:$b),
372+
op_str # ".f64 \t$dst, $a, $b;",
373+
[(set f64:$dst, (op_pat f64:$a, f64:$b))]>;
374+
def f64ri :
375+
NVPTXInst<(outs Float64Regs:$dst),
376+
(ins Float64Regs:$a, f64imm:$b),
377+
op_str # ".f64 \t$dst, $a, $b;",
378+
[(set f64:$dst, (op_pat f64:$a, fpimm:$b))]>;
379+
def f32rr_ftz :
380+
NVPTXInst<(outs Float32Regs:$dst),
381+
(ins Float32Regs:$a, Float32Regs:$b),
382+
op_str # ".ftz.f32 \t$dst, $a, $b;",
383+
[(set f32:$dst, (op_pat f32:$a, f32:$b))]>,
384+
Requires<[doF32FTZ]>;
385+
def f32ri_ftz :
386+
NVPTXInst<(outs Float32Regs:$dst),
387+
(ins Float32Regs:$a, f32imm:$b),
388+
op_str # ".ftz.f32 \t$dst, $a, $b;",
389+
[(set f32:$dst, (op_pat f32:$a, fpimm:$b))]>,
390+
Requires<[doF32FTZ]>;
391+
def f32rr :
392+
NVPTXInst<(outs Float32Regs:$dst),
393+
(ins Float32Regs:$a, Float32Regs:$b),
394+
op_str # ".f32 \t$dst, $a, $b;",
395+
[(set f32:$dst, (op_pat f32:$a, f32:$b))]>;
396+
def f32ri :
397+
NVPTXInst<(outs Float32Regs:$dst),
398+
(ins Float32Regs:$a, f32imm:$b),
399+
op_str # ".f32 \t$dst, $a, $b;",
400+
[(set f32:$dst, (op_pat f32:$a, fpimm:$b))]>;
401+
402+
def f16rr_ftz :
403+
NVPTXInst<(outs Int16Regs:$dst),
404+
(ins Int16Regs:$a, Int16Regs:$b),
405+
op_str # ".ftz.f16 \t$dst, $a, $b;",
406+
[(set f16:$dst, (op_pat f16:$a, f16:$b))]>,
407+
Requires<[useFP16Math, doF32FTZ]>;
408+
def f16rr :
409+
NVPTXInst<(outs Int16Regs:$dst),
410+
(ins Int16Regs:$a, Int16Regs:$b),
411+
op_str # ".f16 \t$dst, $a, $b;",
412+
[(set f16:$dst, (op_pat f16:$a, f16:$b))]>,
413+
Requires<[useFP16Math]>;
414+
415+
def f16x2rr_ftz :
416+
NVPTXInst<(outs Int32Regs:$dst),
417+
(ins Int32Regs:$a, Int32Regs:$b),
418+
op_str # ".ftz.f16x2 \t$dst, $a, $b;",
419+
[(set v2f16:$dst, (op_pat v2f16:$a, v2f16:$b))]>,
420+
Requires<[useFP16Math, doF32FTZ]>;
421+
def f16x2rr :
422+
NVPTXInst<(outs Int32Regs:$dst),
423+
(ins Int32Regs:$a, Int32Regs:$b),
424+
op_str # ".f16x2 \t$dst, $a, $b;",
425+
[(set v2f16:$dst, (op_pat v2f16:$a, v2f16:$b))]>,
426+
Requires<[useFP16Math]>;
427+
def bf16rr :
428+
NVPTXInst<(outs Int16Regs:$dst),
429+
(ins Int16Regs:$a, Int16Regs:$b),
430+
op_str # ".bf16 \t$dst, $a, $b;",
431+
[(set bf16:$dst, (op_pat bf16:$a, bf16:$b))]>,
432+
Requires<[hasBF16Math]>;
433+
434+
def bf16x2rr :
435+
NVPTXInst<(outs Int32Regs:$dst),
436+
(ins Int32Regs:$a, Int32Regs:$b),
437+
op_str # ".bf16x2 \t$dst, $a, $b;",
438+
[(set v2bf16:$dst, (op_pat v2bf16:$a, v2bf16:$b))]>,
439+
Requires<[hasBF16Math]>;
440+
}
420441

421-
def f16x2rr_ftz :
422-
NVPTXInst<(outs Int32Regs:$dst),
423-
(ins Int32Regs:$a, Int32Regs:$b),
424-
!strconcat(OpcStr, ".ftz.f16x2 \t$dst, $a, $b;"),
425-
[(set v2f16:$dst, (OpNode v2f16:$a, v2f16:$b))]>,
426-
Requires<[useFP16Math, allowFMA, doF32FTZ]>;
427-
def f16x2rr :
428-
NVPTXInst<(outs Int32Regs:$dst),
429-
(ins Int32Regs:$a, Int32Regs:$b),
430-
!strconcat(OpcStr, ".f16x2 \t$dst, $a, $b;"),
431-
[(set v2f16:$dst, (OpNode v2f16:$a, v2f16:$b))]>,
432-
Requires<[useFP16Math, allowFMA]>;
433-
def bf16rr :
434-
NVPTXInst<(outs Int16Regs:$dst),
435-
(ins Int16Regs:$a, Int16Regs:$b),
436-
!strconcat(OpcStr, ".bf16 \t$dst, $a, $b;"),
437-
[(set bf16:$dst, (OpNode bf16:$a, bf16:$b))]>,
438-
Requires<[hasBF16Math, allowFMA]>;
442+
class BinOpAllowsFMA<SDPatternOperator operator>
443+
: PatFrag<(ops node:$A, node:$B),
444+
(operator node:$A, node:$B), [{
445+
return allowFMA() || N->getFlags().hasAllowContract();;
446+
}]>;
439447

440-
def bf16x2rr :
441-
NVPTXInst<(outs Int32Regs:$dst),
442-
(ins Int32Regs:$a, Int32Regs:$b),
443-
!strconcat(OpcStr, ".bf16x2 \t$dst, $a, $b;"),
444-
[(set v2bf16:$dst, (OpNode v2bf16:$a, v2bf16:$b))]>,
445-
Requires<[hasBF16Math, allowFMA]>;
446-
// These have strange names so we don't perturb existing mir tests.
447-
def _rnf64rr :
448-
NVPTXInst<(outs Float64Regs:$dst),
449-
(ins Float64Regs:$a, Float64Regs:$b),
450-
!strconcat(OpcStr, ".rn.f64 \t$dst, $a, $b;"),
451-
[(set f64:$dst, (OpNode f64:$a, f64:$b))]>,
452-
Requires<[noFMA]>;
453-
def _rnf64ri :
454-
NVPTXInst<(outs Float64Regs:$dst),
455-
(ins Float64Regs:$a, f64imm:$b),
456-
!strconcat(OpcStr, ".rn.f64 \t$dst, $a, $b;"),
457-
[(set f64:$dst, (OpNode f64:$a, fpimm:$b))]>,
458-
Requires<[noFMA]>;
459-
def _rnf32rr_ftz :
460-
NVPTXInst<(outs Float32Regs:$dst),
461-
(ins Float32Regs:$a, Float32Regs:$b),
462-
!strconcat(OpcStr, ".rn.ftz.f32 \t$dst, $a, $b;"),
463-
[(set f32:$dst, (OpNode f32:$a, Float32Regs:$b))]>,
464-
Requires<[noFMA, doF32FTZ]>;
465-
def _rnf32ri_ftz :
466-
NVPTXInst<(outs Float32Regs:$dst),
467-
(ins Float32Regs:$a, f32imm:$b),
468-
!strconcat(OpcStr, ".rn.ftz.f32 \t$dst, $a, $b;"),
469-
[(set f32:$dst, (OpNode f32:$a, fpimm:$b))]>,
470-
Requires<[noFMA, doF32FTZ]>;
471-
def _rnf32rr :
472-
NVPTXInst<(outs Float32Regs:$dst),
473-
(ins Float32Regs:$a, Float32Regs:$b),
474-
!strconcat(OpcStr, ".rn.f32 \t$dst, $a, $b;"),
475-
[(set f32:$dst, (OpNode f32:$a, f32:$b))]>,
476-
Requires<[noFMA]>;
477-
def _rnf32ri :
478-
NVPTXInst<(outs Float32Regs:$dst),
479-
(ins Float32Regs:$a, f32imm:$b),
480-
!strconcat(OpcStr, ".rn.f32 \t$dst, $a, $b;"),
481-
[(set f32:$dst, (OpNode f32:$a, fpimm:$b))]>,
482-
Requires<[noFMA]>;
483-
def _rnf16rr_ftz :
484-
NVPTXInst<(outs Int16Regs:$dst),
485-
(ins Int16Regs:$a, Int16Regs:$b),
486-
!strconcat(OpcStr, ".rn.ftz.f16 \t$dst, $a, $b;"),
487-
[(set f16:$dst, (OpNode f16:$a, f16:$b))]>,
488-
Requires<[useFP16Math, noFMA, doF32FTZ]>;
489-
def _rnf16rr :
490-
NVPTXInst<(outs Int16Regs:$dst),
491-
(ins Int16Regs:$a, Int16Regs:$b),
492-
!strconcat(OpcStr, ".rn.f16 \t$dst, $a, $b;"),
493-
[(set f16:$dst, (OpNode f16:$a, f16:$b))]>,
494-
Requires<[useFP16Math, noFMA]>;
495-
def _rnf16x2rr_ftz :
496-
NVPTXInst<(outs Int32Regs:$dst),
497-
(ins Int32Regs:$a, Int32Regs:$b),
498-
!strconcat(OpcStr, ".rn.ftz.f16x2 \t$dst, $a, $b;"),
499-
[(set v2f16:$dst, (OpNode v2f16:$a, v2f16:$b))]>,
500-
Requires<[useFP16Math, noFMA, doF32FTZ]>;
501-
def _rnf16x2rr :
502-
NVPTXInst<(outs Int32Regs:$dst),
503-
(ins Int32Regs:$a, Int32Regs:$b),
504-
!strconcat(OpcStr, ".rn.f16x2 \t$dst, $a, $b;"),
505-
[(set v2f16:$dst, (OpNode v2f16:$a, v2f16:$b))]>,
506-
Requires<[useFP16Math, noFMA]>;
507-
def _rnbf16rr_ftz :
508-
NVPTXInst<(outs Int16Regs:$dst),
509-
(ins Int16Regs:$a, Int16Regs:$b),
510-
!strconcat(OpcStr, ".rn.ftz.bf16 \t$dst, $a, $b;"),
511-
[(set bf16:$dst, (OpNode bf16:$a, bf16:$b))]>,
512-
Requires<[hasBF16Math, noFMA, doF32FTZ]>;
513-
def _rnbf16rr :
514-
NVPTXInst<(outs Int16Regs:$dst),
515-
(ins Int16Regs:$a, Int16Regs:$b),
516-
!strconcat(OpcStr, ".rn.bf16 \t$dst, $a, $b;"),
517-
[(set bf16:$dst, (OpNode bf16:$a, bf16:$b))]>,
518-
Requires<[hasBF16Math, noFMA]>;
519-
def _rnbf16x2rr_ftz :
520-
NVPTXInst<(outs Int32Regs:$dst),
521-
(ins Int32Regs:$a, Int32Regs:$b),
522-
!strconcat(OpcStr, ".rn.ftz.bf16x2 \t$dst, $a, $b;"),
523-
[(set v2bf16:$dst, (OpNode v2bf16:$a, v2bf16:$b))]>,
524-
Requires<[hasBF16Math, noFMA, doF32FTZ]>;
525-
def _rnbf16x2rr :
526-
NVPTXInst<(outs Int32Regs:$dst),
527-
(ins Int32Regs:$a, Int32Regs:$b),
528-
!strconcat(OpcStr, ".rn.bf16x2 \t$dst, $a, $b;"),
529-
[(set v2bf16:$dst, (OpNode v2bf16:$a, v2bf16:$b))]>,
530-
Requires<[hasBF16Math, noFMA]>;
448+
multiclass F3_fma_component<string op_str, SDNode op_node> {
449+
defm "" : F3<op_str, BinOpAllowsFMA<op_node>>;
450+
defm _rn : F3<op_str # ".rn", op_node>;
531451
}
532452

533453
// Template for operations which take two f32 or f64 operands. Provides three

‎llvm/test/CodeGen/NVPTX/fp-contract.ll

Lines changed: 95 additions & 14 deletions
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,7 @@
1-
; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_20 -fp-contract=fast | FileCheck %s --check-prefix=FAST
2-
; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_30 | FileCheck %s --check-prefix=DEFAULT
3-
; RUN: %if ptxas %{ llc < %s -mtriple=nvptx64 -mcpu=sm_20 -fp-contract=fast | %ptxas-verify %}
1+
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
2+
; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_30 -fp-contract=fast | FileCheck %s --check-prefixes=CHECK,FAST
3+
; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_30 | FileCheck %s --check-prefixes=CHECK,DEFAULT
4+
; RUN: %if ptxas %{ llc < %s -mtriple=nvptx64 -mcpu=sm_30 -fp-contract=fast | %ptxas-verify %}
45
; RUN: %if ptxas %{ llc < %s -mtriple=nvptx64 -mcpu=sm_30 | %ptxas-verify %}
56

67
target triple = "nvptx64-unknown-cuda"
@@ -11,25 +12,105 @@ target triple = "nvptx64-unknown-cuda"
1112
;; is free to fuse with a multiply if it is able. If fusion is not allowed,
1213
;; we do not form fma.rn at the PTX level and explicitly generate add.rn
1314
;; for all adds to prevent ptxas from fusion the ops.
14-
15-
;; FAST-LABEL: @t0
16-
;; DEFAULT-LABEL: @t0
1715
define float @t0(float %a, float %b, float %c) {
18-
;; FAST: fma.rn.f32
19-
;; DEFAULT: mul.rn.f32
20-
;; DEFAULT: add.rn.f32
16+
; FAST-LABEL: t0(
17+
; FAST: {
18+
; FAST-NEXT: .reg .f32 %f<5>;
19+
; FAST-EMPTY:
20+
; FAST-NEXT: // %bb.0:
21+
; FAST-NEXT: ld.param.f32 %f1, [t0_param_0];
22+
; FAST-NEXT: ld.param.f32 %f2, [t0_param_1];
23+
; FAST-NEXT: ld.param.f32 %f3, [t0_param_2];
24+
; FAST-NEXT: fma.rn.f32 %f4, %f1, %f2, %f3;
25+
; FAST-NEXT: st.param.f32 [func_retval0], %f4;
26+
; FAST-NEXT: ret;
27+
;
28+
; DEFAULT-LABEL: t0(
29+
; DEFAULT: {
30+
; DEFAULT-NEXT: .reg .f32 %f<6>;
31+
; DEFAULT-EMPTY:
32+
; DEFAULT-NEXT: // %bb.0:
33+
; DEFAULT-NEXT: ld.param.f32 %f1, [t0_param_0];
34+
; DEFAULT-NEXT: ld.param.f32 %f2, [t0_param_1];
35+
; DEFAULT-NEXT: mul.rn.f32 %f3, %f1, %f2;
36+
; DEFAULT-NEXT: ld.param.f32 %f4, [t0_param_2];
37+
; DEFAULT-NEXT: add.rn.f32 %f5, %f3, %f4;
38+
; DEFAULT-NEXT: st.param.f32 [func_retval0], %f5;
39+
; DEFAULT-NEXT: ret;
2140
%v0 = fmul float %a, %b
2241
%v1 = fadd float %v0, %c
2342
ret float %v1
2443
}
2544

26-
;; FAST-LABEL: @t1
27-
;; DEFAULT-LABEL: @t1
28-
define float @t1(float %a, float %b) {
2945
;; We cannot form an fma here, but make sure we explicitly emit add.rn.f32
3046
;; to prevent ptxas from fusing this with anything else.
31-
;; FAST: add.f32
32-
;; DEFAULT: add.rn.f32
47+
define float @t1(float %a, float %b) {
48+
; FAST-LABEL: t1(
49+
; FAST: {
50+
; FAST-NEXT: .reg .f32 %f<6>;
51+
; FAST-EMPTY:
52+
; FAST-NEXT: // %bb.0:
53+
; FAST-NEXT: ld.param.f32 %f1, [t1_param_0];
54+
; FAST-NEXT: ld.param.f32 %f2, [t1_param_1];
55+
; FAST-NEXT: add.f32 %f3, %f1, %f2;
56+
; FAST-NEXT: sub.f32 %f4, %f1, %f2;
57+
; FAST-NEXT: mul.f32 %f5, %f3, %f4;
58+
; FAST-NEXT: st.param.f32 [func_retval0], %f5;
59+
; FAST-NEXT: ret;
60+
;
61+
; DEFAULT-LABEL: t1(
62+
; DEFAULT: {
63+
; DEFAULT-NEXT: .reg .f32 %f<6>;
64+
; DEFAULT-EMPTY:
65+
; DEFAULT-NEXT: // %bb.0:
66+
; DEFAULT-NEXT: ld.param.f32 %f1, [t1_param_0];
67+
; DEFAULT-NEXT: ld.param.f32 %f2, [t1_param_1];
68+
; DEFAULT-NEXT: add.rn.f32 %f3, %f1, %f2;
69+
; DEFAULT-NEXT: sub.rn.f32 %f4, %f1, %f2;
70+
; DEFAULT-NEXT: mul.rn.f32 %f5, %f3, %f4;
71+
; DEFAULT-NEXT: st.param.f32 [func_retval0], %f5;
72+
; DEFAULT-NEXT: ret;
3373
%v1 = fadd float %a, %b
74+
%v2 = fsub float %a, %b
75+
%v3 = fmul float %v1, %v2
76+
ret float %v3
77+
}
78+
79+
;; Make sure we generate the non ".rn" version when the "contract" flag is
80+
;; present on the instructions
81+
define float @t2(float %a, float %b) {
82+
; CHECK-LABEL: t2(
83+
; CHECK: {
84+
; CHECK-NEXT: .reg .f32 %f<6>;
85+
; CHECK-EMPTY:
86+
; CHECK-NEXT: // %bb.0:
87+
; CHECK-NEXT: ld.param.f32 %f1, [t2_param_0];
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; CHECK-NEXT: ld.param.f32 %f2, [t2_param_1];
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; CHECK-NEXT: add.f32 %f3, %f1, %f2;
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; CHECK-NEXT: sub.f32 %f4, %f1, %f2;
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; CHECK-NEXT: mul.f32 %f5, %f3, %f4;
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; CHECK-NEXT: st.param.f32 [func_retval0], %f5;
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; CHECK-NEXT: ret;
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%v1 = fadd contract float %a, %b
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%v2 = fsub contract float %a, %b
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%v3 = fmul contract float %v1, %v2
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ret float %v3
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}
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;; Make sure we always fold to fma when the "contract" flag is present
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define float @t3(float %a, float %b, float %c) {
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; CHECK-LABEL: t3(
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; CHECK: {
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; CHECK-NEXT: .reg .f32 %f<5>;
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; CHECK-EMPTY:
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; CHECK-NEXT: // %bb.0:
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; CHECK-NEXT: ld.param.f32 %f1, [t3_param_0];
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; CHECK-NEXT: ld.param.f32 %f2, [t3_param_1];
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; CHECK-NEXT: ld.param.f32 %f3, [t3_param_2];
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; CHECK-NEXT: fma.rn.f32 %f4, %f1, %f2, %f3;
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; CHECK-NEXT: st.param.f32 [func_retval0], %f4;
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; CHECK-NEXT: ret;
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%v0 = fmul contract float %a, %b
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%v1 = fadd contract float %v0, %c
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ret float %v1
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}

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