; 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)