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2f69ee6563
This adds a cost model that takes into account the total number of machine instructions to be removed from each region, the number of instructions added by adding a new function with a set of instructions, and the instructions added by handling arguments. Tests not adding flags: llvm/test/Transforms/IROutliner/outlining-cost-model.ll Reviewers: jroelofs, paquette Differential Revision: https://reviews.llvm.org/D87299
108 lines
4.1 KiB
LLVM
108 lines
4.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -verify -iroutliner -ir-outlining-no-cost < %s | FileCheck %s
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; This test checks that floating point commutative instructions are not treated
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; as commutative. Even though an ffadd is technically commutative, the order
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; of operands still needs to be enforced since the process of fadding floating
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; point values requires the order to be the same.
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; We make sure that we outline the identical regions from the first two
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; functions, but not the third. this is because the operands are in a different
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; order in a floating point instruction in this section.
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define void @outline_from_fadd1() {
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; CHECK-LABEL: @outline_from_fadd1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A:%.*]] = alloca double, align 4
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; CHECK-NEXT: [[B:%.*]] = alloca double, align 4
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; CHECK-NEXT: [[C:%.*]] = alloca double, align 4
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; CHECK-NEXT: call void @outlined_ir_func_0(double* [[A]], double* [[B]], double* [[C]])
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; CHECK-NEXT: ret void
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;
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entry:
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%a = alloca double, align 4
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%b = alloca double, align 4
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%c = alloca double, align 4
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store double 2.0, double* %a, align 4
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store double 3.0, double* %b, align 4
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store double 4.0, double* %c, align 4
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%al = load double, double* %a
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%bl = load double, double* %b
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%cl = load double, double* %c
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%0 = fadd double %al, %bl
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%1 = fadd double %al, %cl
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%2 = fadd double %bl, %cl
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ret void
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}
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define void @outline_from_fadd2.0() {
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; CHECK-LABEL: @outline_from_fadd2.0(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A:%.*]] = alloca double, align 4
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; CHECK-NEXT: [[B:%.*]] = alloca double, align 4
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; CHECK-NEXT: [[C:%.*]] = alloca double, align 4
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; CHECK-NEXT: call void @outlined_ir_func_0(double* [[A]], double* [[B]], double* [[C]])
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; CHECK-NEXT: ret void
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;
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entry:
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%a = alloca double, align 4
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%b = alloca double, align 4
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%c = alloca double, align 4
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store double 2.0, double* %a, align 4
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store double 3.0, double* %b, align 4
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store double 4.0, double* %c, align 4
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%al = load double, double* %a
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%bl = load double, double* %b
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%cl = load double, double* %c
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%0 = fadd double %al, %bl
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%1 = fadd double %al, %cl
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%2 = fadd double %bl, %cl
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ret void
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}
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define void @outline_from_flipped_fadd3.0() {
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; CHECK-LABEL: @outline_from_flipped_fadd3.0(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A:%.*]] = alloca double, align 4
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; CHECK-NEXT: [[B:%.*]] = alloca double, align 4
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; CHECK-NEXT: [[C:%.*]] = alloca double, align 4
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; CHECK-NEXT: store double 2.000000e+00, double* [[A]], align 4
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; CHECK-NEXT: store double 3.000000e+00, double* [[B]], align 4
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; CHECK-NEXT: store double 4.000000e+00, double* [[C]], align 4
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; CHECK-NEXT: [[AL:%.*]] = load double, double* [[A]], align 8
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; CHECK-NEXT: [[BL:%.*]] = load double, double* [[B]], align 8
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; CHECK-NEXT: [[CL:%.*]] = load double, double* [[C]], align 8
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; CHECK-NEXT: [[TMP0:%.*]] = fadd double [[BL]], [[AL]]
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; CHECK-NEXT: [[TMP1:%.*]] = fadd double [[CL]], [[AL]]
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; CHECK-NEXT: [[TMP2:%.*]] = fadd double [[CL]], [[BL]]
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; CHECK-NEXT: ret void
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;
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entry:
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%a = alloca double, align 4
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%b = alloca double, align 4
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%c = alloca double, align 4
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store double 2.0, double* %a, align 4
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store double 3.0, double* %b, align 4
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store double 4.0, double* %c, align 4
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%al = load double, double* %a
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%bl = load double, double* %b
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%cl = load double, double* %c
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%0 = fadd double %bl, %al
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%1 = fadd double %cl, %al
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%2 = fadd double %cl, %bl
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ret void
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}
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; CHECK: define internal void @outlined_ir_func_0(double* [[ARG0:%.*]], double* [[ARG1:%.*]], double* [[ARG2:%.*]]) #0 {
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; CHECK: entry_to_outline:
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; CHECK-NEXT: store double 2.000000e+00, double* [[ARG0]], align 4
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; CHECK-NEXT: store double 3.000000e+00, double* [[ARG1]], align 4
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; CHECK-NEXT: store double 4.000000e+00, double* [[ARG2]], align 4
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; CHECK-NEXT: [[AL:%.*]] = load double, double* [[ARG0]], align 8
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; CHECK-NEXT: [[BL:%.*]] = load double, double* [[ARG1]], align 8
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; CHECK-NEXT: [[CL:%.*]] = load double, double* [[ARG2]], align 8
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; CHECK-NEXT: [[TMP0:%.*]] = fadd double [[AL]], [[BL]]
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; CHECK-NEXT: [[TMP1:%.*]] = fadd double [[AL]], [[CL]]
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; CHECK-NEXT: [[TMP2:%.*]] = fadd double [[BL]], [[CL]]
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