| # RUN: llc -mtriple=aarch64-apple-darwin -run-pass=prologepilog \ |
| # RUN: -run-pass=machine-outliner -verify-machineinstrs %s -o - | FileCheck %s |
| # Check that we save LR to a callee-saved register when possible. |
| # foo() should use a callee-saved register. However, bar() should not. |
| --- | |
| |
| define void @foo() #0 { |
| ret void |
| } |
| |
| define void @bar() #0 { |
| ret void |
| } |
| |
| attributes #0 = { minsize noinline noredzone "no-frame-pointer-elim"="true" } |
| ... |
| --- |
| # Make sure that when we outline and a register is available, we |
| # use it to save + restore LR instead of SP. |
| # CHECK: name: foo |
| # CHECK-DAG: bb.0 |
| # CHECK-DAG: $x[[REG:[0-9]+]] = ORRXrs $xzr, $lr, 0 |
| # CHECK-NEXT: BL |
| # CHECK-NEXT: $lr = ORRXrs $xzr, $x[[REG]], 0 |
| # CHECK-DAG: bb.1 |
| # CHECK-DAG: $x[[REG]] = ORRXrs $xzr, $lr, 0 |
| # CHECK-NEXT: BL |
| # CHECK-NEXT: $lr = ORRXrs $xzr, $x[[REG]], 0 |
| # CHECK-DAG: bb.2 |
| # CHECK-DAG: $x[[REG]] = ORRXrs $xzr, $lr, 0 |
| # CHECK-NEXT: BL |
| # CHECK-NEXT: $lr = ORRXrs $xzr, $x[[REG]], 0 |
| name: foo |
| tracksRegLiveness: true |
| fixedStack: |
| body: | |
| bb.0: |
| liveins: $lr, $w9 |
| $x25 = ORRXri $xzr, 1 |
| $w9 = ORRWri $wzr, 1 |
| $w9 = ORRWri $wzr, 1 |
| $w9 = ORRWri $wzr, 1 |
| $w9 = ORRWri $wzr, 1 |
| $w9 = ORRWri $wzr, 1 |
| $w9 = ORRWri $wzr, 2 |
| bb.1: |
| liveins: $lr, $w9 |
| $w9 = ORRWri $wzr, 1 |
| $w9 = ORRWri $wzr, 1 |
| $w9 = ORRWri $wzr, 1 |
| $w9 = ORRWri $wzr, 1 |
| $w9 = ORRWri $wzr, 1 |
| $w9 = ORRWri $wzr, 2 |
| bb.2: |
| liveins: $lr, $w9 |
| $w9 = ORRWri $wzr, 1 |
| $w9 = ORRWri $wzr, 1 |
| $w9 = ORRWri $wzr, 1 |
| $w9 = ORRWri $wzr, 1 |
| $w9 = ORRWri $wzr, 1 |
| $w9 = ORRWri $wzr, 2 |
| RET undef $lr |
| |
| ... |
| --- |
| # Convoluted case that shows that we'll still save to the stack when there are |
| # no approprate registers available. |
| # The live-in lists do not contain x16 or x17 since including them would cause |
| # nothing to be outlined. |
| # They also deliberately don't contain x18 to show that on Darwin we won't store |
| # to that. |
| # CHECK-LABEL: name: bar |
| # CHECK: early-clobber $sp = STRXpre $lr, $sp, -16 |
| # CHECK-NEXT: BL |
| # CHECK-DAG: early-clobber $sp, $lr = LDRXpost $sp, 16 |
| # CHECK: early-clobber $sp = STRXpre $lr, $sp, -16 |
| # CHECK-NEXT: BL |
| # CHECK-DAG: early-clobber $sp, $lr = LDRXpost $sp, 16 |
| # CHECK: early-clobber $sp = STRXpre $lr, $sp, -16 |
| # CHECK-NEXT: BL |
| # CHECK-NEXT: early-clobber $sp, $lr = LDRXpost $sp, 16 |
| name: bar |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28 |
| $w10 = ORRWri $wzr, 1 |
| $w10 = ORRWri $wzr, 1 |
| $w10 = ORRWri $wzr, 1 |
| $w10 = ORRWri $wzr, 1 |
| $w10 = ORRWri $wzr, 1 |
| $w12 = ORRWri $wzr, 2 |
| bb.1: |
| liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28 |
| $w10 = ORRWri $wzr, 1 |
| $w10 = ORRWri $wzr, 1 |
| $w10 = ORRWri $wzr, 1 |
| $w10 = ORRWri $wzr, 1 |
| $w10 = ORRWri $wzr, 1 |
| $w12 = ORRWri $wzr, 2 |
| bb.2: |
| liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28 |
| $w10 = ORRWri $wzr, 1 |
| $w10 = ORRWri $wzr, 1 |
| $w10 = ORRWri $wzr, 1 |
| $w10 = ORRWri $wzr, 1 |
| $w10 = ORRWri $wzr, 1 |
| $w12 = ORRWri $wzr, 2 |
| bb.3: |
| liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28 |
| RET undef $lr |
| |
