[RISCV] Add RUNs for different postra scheduling directions

To `macro-fusion-lui-addi.ll`.

This is the precommit change for #116584.

Author: wangpc-pp

llvm/test/CodeGen/RISCV/macro-fusion-lui-addi.ll

@@ -4,7 +4,14 @@
 ;RUN: llc < %s -mtriple=riscv64 -mattr=+f,+lui-addi-fusion -mcpu=sifive-u74 \
 ;RUN:   -target-abi=lp64f | FileCheck %s --check-prefix=FUSION
 ;RUN: llc < %s -mtriple=riscv64 -mattr=+f,+lui-addi-fusion,+use-postra-scheduler -mcpu=sifive-u74 \
-;RUN:   -target-abi=lp64f | FileCheck %s --check-prefixes=FUSION-POSTRA
+;RUN:   -misched-postra-direction=topdown -target-abi=lp64f \
+;RUN:   | FileCheck %s --check-prefixes=FUSION-POSTRA,FUSION-POSTRA-TOPDOWN
+;RUN: llc < %s -mtriple=riscv64 -mattr=+f,+lui-addi-fusion,+use-postra-scheduler -mcpu=sifive-u74 \
+;RUN:   -misched-postra-direction=bottomup -target-abi=lp64f \
+;RUN:   | FileCheck %s --check-prefixes=FUSION-POSTRA,FUSION-POSTRA-BOTTOMUP
+;RUN: llc < %s -mtriple=riscv64 -mattr=+f,+lui-addi-fusion,+use-postra-scheduler -mcpu=sifive-u74 \
+;RUN:   -misched-postra-direction=bidirectional -target-abi=lp64f \
+;RUN:   | FileCheck %s --check-prefixes=FUSION-POSTRA,FUSION-POSTRA-BIDIRECTIONAL
 
 @.str = private constant [4 x i8] c"%f\0A\00", align 1
 
@@ -23,12 +30,26 @@ define void @foo(i32 signext %0, i32 signext %1) {
 ; FUSION-NEXT:    fcvt.s.w fa0, a1
 ; FUSION-NEXT:    tail bar
 ;
-; FUSION-POSTRA-LABEL: foo:
-; FUSION-POSTRA:       # %bb.0:
-; FUSION-POSTRA-NEXT:    lui a0, %hi(.L.str)
-; FUSION-POSTRA-NEXT:    addi a0, a0, %lo(.L.str)
-; FUSION-POSTRA-NEXT:    fcvt.s.w fa0, a1
-; FUSION-POSTRA-NEXT:    tail bar
+; FUSION-POSTRA-TOPDOWN-LABEL: foo:
+; FUSION-POSTRA-TOPDOWN:       # %bb.0:
+; FUSION-POSTRA-TOPDOWN-NEXT:    lui a0, %hi(.L.str)
+; FUSION-POSTRA-TOPDOWN-NEXT:    addi a0, a0, %lo(.L.str)
+; FUSION-POSTRA-TOPDOWN-NEXT:    fcvt.s.w fa0, a1
+; FUSION-POSTRA-TOPDOWN-NEXT:    tail bar
+;
+; FUSION-POSTRA-BOTTOMUP-LABEL: foo:
+; FUSION-POSTRA-BOTTOMUP:       # %bb.0:
+; FUSION-POSTRA-BOTTOMUP-NEXT:    fcvt.s.w fa0, a1
+; FUSION-POSTRA-BOTTOMUP-NEXT:    lui a0, %hi(.L.str)
+; FUSION-POSTRA-BOTTOMUP-NEXT:    addi a0, a0, %lo(.L.str)
+; FUSION-POSTRA-BOTTOMUP-NEXT:    tail bar
+;
+; FUSION-POSTRA-BIDIRECTIONAL-LABEL: foo:
+; FUSION-POSTRA-BIDIRECTIONAL:       # %bb.0:
+; FUSION-POSTRA-BIDIRECTIONAL-NEXT:    lui a0, %hi(.L.str)
+; FUSION-POSTRA-BIDIRECTIONAL-NEXT:    fcvt.s.w fa0, a1
+; FUSION-POSTRA-BIDIRECTIONAL-NEXT:    addi a0, a0, %lo(.L.str)
+; FUSION-POSTRA-BIDIRECTIONAL-NEXT:    tail bar
   %3 = sitofp i32 %1 to float
   tail call void @bar(ptr @.str, float %3)
   ret void