| # RUN: llc -mtriple=arm64-apple-ios -run-pass=prologepilog -run-pass=machine-outliner -verify-machineinstrs %s -o - | FileCheck %s |
| |
| # Noreturn functions conservatively need to save and restore lr. |
| # When there is no available register, the stack is used at call site. |
| # If the stack also needs to be set up for a call in the outlined function, |
| # bail-out this case since we do not handle adjusting the stack twice. |
| |
| # CHECK: OUTLINED_FUNCTION |
| |
| --- | |
| @g = external global i32 |
| define void @stack_1() #0 { ret void } |
| define void @stack_2() #0 { ret void } |
| define void @baz() { ret void } |
| attributes #0 = { noredzone } |
| ... |
| --- |
| name: stack_1 |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $x4, $x0, $x1, $x2, $x3 |
| $w8 = MOVZWi 259, 0 |
| $x9 = ADRP target-flags(aarch64-page) @g |
| $x9 = ADDXri $x9, target-flags(aarch64-pageoff, aarch64-nc) @g, 0 |
| STRXui $x9, $x1, 0 |
| STRHHui $w8, $x1, 8 |
| $w8 = ORRWrs $wzr, $w4, 0, implicit-def $x8 |
| STRXui $x8, $x3, 0 |
| STPXi $x3, $xzr, $x2, 0 |
| $w8 = MOVZWi 271, 0 |
| STRHHui $w8, $x2, 8 |
| $x8 = ORRXrs $xzr, $x0, 0 |
| $x0 = ORRXrs $xzr, $x1, 0 |
| $x1 = ORRXrs $xzr, $x2, 0 |
| BL @baz, implicit-def dead $lr, implicit $sp, implicit $x8, implicit $x0, implicit $x1, implicit $x3, implicit $x4, implicit-def $sp, implicit-def $x5, implicit-def $x6, implicit-def $x7, implicit-def $x8, implicit-def $x9, implicit-def $x10, implicit-def $x11, implicit-def $x12, implicit-def $x13, implicit-def $x14, implicit-def $x15, implicit-def $x18 |
| BRK 1 |
| ... |
| --- |
| name: stack_2 |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $x4, $x0, $x1, $x2, $x3 |
| $w8 = MOVZWi 259, 0 |
| $x9 = ADRP target-flags(aarch64-page) @g |
| $x9 = ADDXri $x9, target-flags(aarch64-pageoff, aarch64-nc) @g, 0 |
| STRXui $x9, $x1, 0 |
| STRHHui $w8, $x1, 8 |
| $w8 = ORRWrs $wzr, $w4, 0, implicit-def $x8 |
| STRXui $x8, $x3, 0 |
| STPXi $x3, $xzr, $x2, 0 |
| $w8 = MOVZWi 271, 0 |
| STRHHui $w8, $x2, 8 |
| $x8 = ORRXrs $xzr, $x0, 0 |
| $x0 = ORRXrs $xzr, $x1, 0 |
| $x1 = ORRXrs $xzr, $x2, 0 |
| BL @baz, implicit-def dead $lr, implicit $sp, implicit $x8, implicit $x0, implicit $x1, implicit $x3, implicit $x4, implicit-def $sp, implicit-def $x5, implicit-def $x6, implicit-def $x7, implicit-def $x8, implicit-def $x9, implicit-def $x10, implicit-def $x11, implicit-def $x12, implicit-def $x13, implicit-def $x14, implicit-def $x15, implicit-def $x18 |
| BRK 1 |
| ... |
| --- |
| name: baz |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $w0, $lr, $w8 |
| RET undef $lr |