| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc -O1 -mtriple=riscv32 -verify-machineinstrs < %s \ |
| ; RUN: | FileCheck %s -check-prefix=RV32I |
| |
| @a = common global i32 0, align 4 |
| @l = common global i32 0, align 4 |
| @b = common global i32 0, align 4 |
| @c = common global i32 0, align 4 |
| @d = common global i32 0, align 4 |
| @e = common global i32 0, align 4 |
| @k = common global i32 0, align 4 |
| @f = common global i32 0, align 4 |
| @j = common global i32 0, align 4 |
| @g = common global i32 0, align 4 |
| @i = common global i32 0, align 4 |
| @h = common global i32 0, align 4 |
| |
| ; This test case benefits from codegen recognising that some values are |
| ; trivially rematerialisable, meaning they are recreated rather than saved to |
| ; the stack and restored. It creates high register pressure to force this |
| ; situation. |
| |
| define i32 @test() nounwind { |
| ; RV32I-LABEL: test: |
| ; RV32I: # %bb.0: # %entry |
| ; RV32I-NEXT: addi sp, sp, -48 |
| ; RV32I-NEXT: sw ra, 44(sp) |
| ; RV32I-NEXT: sw s1, 40(sp) |
| ; RV32I-NEXT: sw s2, 36(sp) |
| ; RV32I-NEXT: sw s3, 32(sp) |
| ; RV32I-NEXT: sw s4, 28(sp) |
| ; RV32I-NEXT: sw s5, 24(sp) |
| ; RV32I-NEXT: sw s6, 20(sp) |
| ; RV32I-NEXT: sw s7, 16(sp) |
| ; RV32I-NEXT: sw s8, 12(sp) |
| ; RV32I-NEXT: sw s9, 8(sp) |
| ; RV32I-NEXT: sw s10, 4(sp) |
| ; RV32I-NEXT: sw s11, 0(sp) |
| ; RV32I-NEXT: lui s3, %hi(a) |
| ; RV32I-NEXT: lw a0, %lo(a)(s3) |
| ; RV32I-NEXT: beqz a0, .LBB0_11 |
| ; RV32I-NEXT: # %bb.1: # %for.body.preheader |
| ; RV32I-NEXT: lui s5, %hi(k) |
| ; RV32I-NEXT: lui s6, %hi(j) |
| ; RV32I-NEXT: lui s7, %hi(i) |
| ; RV32I-NEXT: lui s9, %hi(g) |
| ; RV32I-NEXT: lui s10, %hi(f) |
| ; RV32I-NEXT: lui s1, %hi(e) |
| ; RV32I-NEXT: lui s8, %hi(d) |
| ; RV32I-NEXT: addi s11, zero, 32 |
| ; RV32I-NEXT: lui s2, %hi(c) |
| ; RV32I-NEXT: lui s4, %hi(b) |
| ; RV32I-NEXT: .LBB0_2: # %for.body |
| ; RV32I-NEXT: # =>This Inner Loop Header: Depth=1 |
| ; RV32I-NEXT: lui a1, %hi(l) |
| ; RV32I-NEXT: lw a1, %lo(l)(a1) |
| ; RV32I-NEXT: beqz a1, .LBB0_4 |
| ; RV32I-NEXT: # %bb.3: # %if.then |
| ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1 |
| ; RV32I-NEXT: lw a4, %lo(e)(s1) |
| ; RV32I-NEXT: lw a3, %lo(d)(s8) |
| ; RV32I-NEXT: lw a2, %lo(c)(s2) |
| ; RV32I-NEXT: lw a1, %lo(b)(s4) |
| ; RV32I-NEXT: mv a5, s11 |
| ; RV32I-NEXT: call foo |
| ; RV32I-NEXT: .LBB0_4: # %if.end |
| ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1 |
| ; RV32I-NEXT: lw a0, %lo(k)(s5) |
| ; RV32I-NEXT: beqz a0, .LBB0_6 |
| ; RV32I-NEXT: # %bb.5: # %if.then3 |
| ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1 |
| ; RV32I-NEXT: lw a4, %lo(f)(s10) |
| ; RV32I-NEXT: lw a3, %lo(e)(s1) |
| ; RV32I-NEXT: lw a2, %lo(d)(s8) |
| ; RV32I-NEXT: lw a1, %lo(c)(s2) |
| ; RV32I-NEXT: lw a0, %lo(b)(s4) |
| ; RV32I-NEXT: addi a5, zero, 64 |
| ; RV32I-NEXT: call foo |
| ; RV32I-NEXT: .LBB0_6: # %if.end5 |
| ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1 |
| ; RV32I-NEXT: lw a0, %lo(j)(s6) |
| ; RV32I-NEXT: beqz a0, .LBB0_8 |
| ; RV32I-NEXT: # %bb.7: # %if.then7 |
| ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1 |
| ; RV32I-NEXT: lw a4, %lo(g)(s9) |
| ; RV32I-NEXT: lw a3, %lo(f)(s10) |
| ; RV32I-NEXT: lw a2, %lo(e)(s1) |
| ; RV32I-NEXT: lw a1, %lo(d)(s8) |
| ; RV32I-NEXT: lw a0, %lo(c)(s2) |
| ; RV32I-NEXT: mv a5, s11 |
| ; RV32I-NEXT: call foo |
| ; RV32I-NEXT: .LBB0_8: # %if.end9 |
| ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1 |
| ; RV32I-NEXT: lw a0, %lo(i)(s7) |
| ; RV32I-NEXT: beqz a0, .LBB0_10 |
| ; RV32I-NEXT: # %bb.9: # %if.then11 |
| ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1 |
| ; RV32I-NEXT: lui a0, %hi(h) |
| ; RV32I-NEXT: lw a4, %lo(h)(a0) |
| ; RV32I-NEXT: lw a3, %lo(g)(s9) |
| ; RV32I-NEXT: lw a2, %lo(f)(s10) |
| ; RV32I-NEXT: lw a1, %lo(e)(s1) |
| ; RV32I-NEXT: lw a0, %lo(d)(s8) |
| ; RV32I-NEXT: mv a5, s11 |
| ; RV32I-NEXT: call foo |
| ; RV32I-NEXT: .LBB0_10: # %for.inc |
| ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1 |
| ; RV32I-NEXT: lw a0, %lo(a)(s3) |
| ; RV32I-NEXT: addi a0, a0, -1 |
| ; RV32I-NEXT: sw a0, %lo(a)(s3) |
| ; RV32I-NEXT: bnez a0, .LBB0_2 |
| ; RV32I-NEXT: .LBB0_11: # %for.end |
| ; RV32I-NEXT: addi a0, zero, 1 |
| ; RV32I-NEXT: lw s11, 0(sp) |
| ; RV32I-NEXT: lw s10, 4(sp) |
| ; RV32I-NEXT: lw s9, 8(sp) |
| ; RV32I-NEXT: lw s8, 12(sp) |
| ; RV32I-NEXT: lw s7, 16(sp) |
| ; RV32I-NEXT: lw s6, 20(sp) |
| ; RV32I-NEXT: lw s5, 24(sp) |
| ; RV32I-NEXT: lw s4, 28(sp) |
| ; RV32I-NEXT: lw s3, 32(sp) |
| ; RV32I-NEXT: lw s2, 36(sp) |
| ; RV32I-NEXT: lw s1, 40(sp) |
| ; RV32I-NEXT: lw ra, 44(sp) |
| ; RV32I-NEXT: addi sp, sp, 48 |
| ; RV32I-NEXT: ret |
| entry: |
| %.pr = load i32, i32* @a, align 4 |
| %tobool14 = icmp eq i32 %.pr, 0 |
| br i1 %tobool14, label %for.end, label %for.body |
| |
| for.body: ; preds = %entry, %for.inc |
| %0 = phi i32 [ %dec, %for.inc ], [ %.pr, %entry ] |
| %1 = load i32, i32* @l, align 4 |
| %tobool1 = icmp eq i32 %1, 0 |
| br i1 %tobool1, label %if.end, label %if.then |
| |
| if.then: ; preds = %for.body |
| %2 = load i32, i32* @b, align 4 |
| %3 = load i32, i32* @c, align 4 |
| %4 = load i32, i32* @d, align 4 |
| %5 = load i32, i32* @e, align 4 |
| %call = tail call i32 @foo(i32 %0, i32 %2, i32 %3, i32 %4, i32 %5, i32 32) #3 |
| br label %if.end |
| |
| if.end: ; preds = %for.body, %if.then |
| %6 = load i32, i32* @k, align 4 |
| %tobool2 = icmp eq i32 %6, 0 |
| br i1 %tobool2, label %if.end5, label %if.then3 |
| |
| if.then3: ; preds = %if.end |
| %7 = load i32, i32* @b, align 4 |
| %8 = load i32, i32* @c, align 4 |
| %9 = load i32, i32* @d, align 4 |
| %10 = load i32, i32* @e, align 4 |
| %11 = load i32, i32* @f, align 4 |
| %call4 = tail call i32 @foo(i32 %7, i32 %8, i32 %9, i32 %10, i32 %11, i32 64) #3 |
| br label %if.end5 |
| |
| if.end5: ; preds = %if.end, %if.then3 |
| %12 = load i32, i32* @j, align 4 |
| %tobool6 = icmp eq i32 %12, 0 |
| br i1 %tobool6, label %if.end9, label %if.then7 |
| |
| if.then7: ; preds = %if.end5 |
| %13 = load i32, i32* @c, align 4 |
| %14 = load i32, i32* @d, align 4 |
| %15 = load i32, i32* @e, align 4 |
| %16 = load i32, i32* @f, align 4 |
| %17 = load i32, i32* @g, align 4 |
| %call8 = tail call i32 @foo(i32 %13, i32 %14, i32 %15, i32 %16, i32 %17, i32 32) #3 |
| br label %if.end9 |
| |
| if.end9: ; preds = %if.end5, %if.then7 |
| %18 = load i32, i32* @i, align 4 |
| %tobool10 = icmp eq i32 %18, 0 |
| br i1 %tobool10, label %for.inc, label %if.then11 |
| |
| if.then11: ; preds = %if.end9 |
| %19 = load i32, i32* @d, align 4 |
| %20 = load i32, i32* @e, align 4 |
| %21 = load i32, i32* @f, align 4 |
| %22 = load i32, i32* @g, align 4 |
| %23 = load i32, i32* @h, align 4 |
| %call12 = tail call i32 @foo(i32 %19, i32 %20, i32 %21, i32 %22, i32 %23, i32 32) #3 |
| br label %for.inc |
| |
| for.inc: ; preds = %if.end9, %if.then11 |
| %24 = load i32, i32* @a, align 4 |
| %dec = add nsw i32 %24, -1 |
| store i32 %dec, i32* @a, align 4 |
| %tobool = icmp eq i32 %dec, 0 |
| br i1 %tobool, label %for.end, label %for.body |
| |
| for.end: ; preds = %for.inc, %entry |
| ret i32 1 |
| } |
| |
| declare i32 @foo(i32, i32, i32, i32, i32, i32) |
