1; For ELFv2 ABI, we can avoid allocating the parameter area in the stack frame of the caller function 2; if all the arguments can be passed to the callee in registers. 3; For ELFv1 ABI, we always need to allocate the parameter area. 4 5; Tests for ELFv2 ABI 6; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -target-abi elfv2 < %s | FileCheck %s -check-prefix=PPC64-ELFV2 7; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -target-abi elfv2 < %s | FileCheck %s -check-prefix=PPC64-ELFV2 8 9; Tests for ELFv1 ABI 10; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -target-abi elfv1 < %s | FileCheck %s -check-prefix=PPC64-ELFV1 11; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -target-abi elfv1 < %s | FileCheck %s -check-prefix=PPC64-ELFV1 12 13; If the callee has at most eight integer args, parameter area can be ommited for ELFv2 ABI. 14 15; PPC64-ELFV2-LABEL: WithoutParamArea1: 16; PPC64-ELFV2-NOT: stw {{[0-9]+}}, -{{[0-9]+}}(1) 17; PPC64-ELFV2: stdu 1, -32(1) 18; PPC64-ELFV2: addi 1, 1, 32 19; PPC64-ELFV2-NOT: lwz {{[0-9]+}}, -{{[0-9]+}}(1) 20; PPC64-ELFV1-LABEL: WithoutParamArea1: 21; PPC64-ELFV1-NOT: stw {{[0-9]+}}, -{{[0-9]+}}(1) 22; PPC64-ELFV1: stdu 1, -112(1) 23; PPC64-ELFV1: addi 1, 1, 112 24; PPC64-ELFV1-NOT: lwz {{[0-9]+}}, -{{[0-9]+}}(1) 25define signext i32 @WithoutParamArea1(i32 signext %a) local_unnamed_addr #0 { 26entry: 27 %call = tail call signext i32 @onearg(i32 signext %a) #2 28 ret i32 %call 29} 30 31; PPC64-ELFV2-LABEL: WithoutParamArea2: 32; PPC64-ELFV2-NOT: stw {{[0-9]+}}, -{{[0-9]+}}(1) 33; PPC64-ELFV2: stdu 1, -32(1) 34; PPC64-ELFV2: addi 1, 1, 32 35; PPC64-ELFV2-NOT: lwz {{[0-9]+}}, -{{[0-9]+}}(1) 36; PPC64-ELFV1-LABEL: WithoutParamArea2: 37; PPC64-ELFV1-NOT: stw {{[0-9]+}}, -{{[0-9]+}}(1) 38; PPC64-ELFV1: stdu 1, -112(1) 39; PPC64-ELFV1: addi 1, 1, 112 40; PPC64-ELFV1-NOT: lwz {{[0-9]+}}, -{{[0-9]+}}(1) 41define signext i32 @WithoutParamArea2(i32 signext %a) local_unnamed_addr #0 { 42entry: 43 %call = tail call signext i32 @eightargs(i32 signext %a, i32 signext %a, i32 signext %a, i32 signext %a, i32 signext %a, i32 signext %a, i32 signext %a, i32 signext %a) #2 44 ret i32 %call 45} 46 47; If the callee has more than eight integer args or variable number of args, 48; parameter area cannot be ommited even for ELFv2 ABI 49 50; PPC64-ELFV2-LABEL: WithParamArea1: 51; PPC64-ELFV2-NOT: stw {{[0-9]+}}, -{{[0-9]+}}(1) 52; PPC64-ELFV2: stdu 1, -96(1) 53; PPC64-ELFV2: addi 1, 1, 96 54; PPC64-ELFV2-NOT: lwz {{[0-9]+}}, -{{[0-9]+}}(1) 55; PPC64-ELFV1-LABEL: WithParamArea1: 56; PPC64-ELFV1-NOT: stw {{[0-9]+}}, -{{[0-9]+}}(1) 57; PPC64-ELFV1: stdu 1, -112(1) 58; PPC64-ELFV1: addi 1, 1, 112 59; PPC64-ELFV1-NOT: lwz {{[0-9]+}}, -{{[0-9]+}}(1) 60define signext i32 @WithParamArea1(i32 signext %a) local_unnamed_addr #0 { 61entry: 62 %call = tail call signext i32 (i32, ...) @varargs(i32 signext %a, i32 signext %a) #2 63 ret i32 %call 64} 65 66; PPC64-ELFV2-LABEL: WithParamArea2: 67; PPC64-ELFV2-NOT: stw {{[0-9]+}}, -{{[0-9]+}}(1) 68; PPC64-ELFV2: stdu 1, -112(1) 69; PPC64-ELFV2: addi 1, 1, 112 70; PPC64-ELFV2-NOT: lwz {{[0-9]+}}, -{{[0-9]+}}(1) 71; PPC64-ELFV1-LABEL: WithParamArea2: 72; PPC64-ELFV1-NOT: stw {{[0-9]+}}, -{{[0-9]+}}(1) 73; PPC64-ELFV1: stdu 1, -128(1) 74; PPC64-ELFV1: addi 1, 1, 128 75; PPC64-ELFV1-NOT: lwz {{[0-9]+}}, -{{[0-9]+}}(1) 76define signext i32 @WithParamArea2(i32 signext %a) local_unnamed_addr #0 { 77entry: 78 %call = tail call signext i32 @nineargs(i32 signext %a, i32 signext %a, i32 signext %a, i32 signext %a, i32 signext %a, i32 signext %a, i32 signext %a, i32 signext %a, i32 signext %a) #2 79 ret i32 %call 80} 81 82declare signext i32 @onearg(i32 signext) local_unnamed_addr #1 83declare signext i32 @eightargs(i32 signext, i32 signext, i32 signext, i32 signext, i32 signext, i32 signext, i32 signext, i32 signext) local_unnamed_addr #1 84declare signext i32 @nineargs(i32 signext, i32 signext, i32 signext, i32 signext, i32 signext, i32 signext, i32 signext, i32 signext, i32 signext) local_unnamed_addr #1 85declare signext i32 @varargs(i32 signext, ...) local_unnamed_addr #1 86 87